Status: Special Area of Conservation (SAC)
Haisborough, Hammond and Winterton MPA is located off of the north-east coast of Norfolk, encompassing a wide range of sandbank types and biogenic reef. The site lies across the 12 nm territorial sea limit, and therefore advice for this MPA is jointly delivered with Natural England.
Site
Located off of the north-east coast of Norfolk, the Haisborough, Hammond and Winterton SAC contains the protected features 'Sandbanks slightly covered by sea water all the time' and 'Reefs'. The site lies across the 12 nm territorial sea limit, and therefore advice for this MPA is jointly delivered with Natural England.
The site contains a series of sandbanks formed via headland associated geological processes since the 5th century AD. These sandbanks are curved, run parallel to the coast, are composed of sandy sediment and lie in full salinity water with intermediate coastal influence. The site contains a mosaic of different physical habitats corresponding to different biological communities. The fauna of the sandbank crests is predominantly low-diversity polychaete and amphipod communities that are typical of mobile sediment environments. A margin of 500 m has been added around the edges of all sandbanks within the site to reflect current uncertainty in feature extent. As well as this margin an additional margin of 1,000 m has been added to the boundary of Middle and North Cross sandbank in the south-west of the site, to account for projected movement of the sandbank over a period of 10 years since bank delineation in 2010. While the areas inside these margins are not confirmed but potential feature, JNCC advises a precautionary approach to their management (i.e. treat them as if they were confirmed feature to ensure appropriate protection now and into the future). The banks are separated by troughs containing more gravelly sediments supporting diverse infaunal and epifaunal communities with occurrences of reefs of the tube-building ross worm Sabellaria spinulosa. Aggregations of S. spinulosa provide additional hard substrate for the development of rich epifaunal communities. A margin of 500 m has also been applied to the point and line records of Sabellaria. Similarly, while the areas inside these margins are not confirmed but potential feature, JNCC advises a precautionary approach to their management (i.e. treat them as if they were confirmed feature to ensure appropriate protection now and into the future).
The Haisborough, Hammond and Winterton SAC overlaps with an MPA that has been identified for the protection of harbour porpoise – the Southern North Sea SAC. For more information, please see the Southern North Sea MPA Site Information Centre.
More detailed site information can be found in the Summary section below.
Map displaying the Haisborough, Hammond and Winterton MPA boundary and associated protected feature data. Visit JNCC's MPA Mapper to further view and explore data for this MPA.
Note: Margins are included within the "Sandbanks which are slightly covered by sea water all the time" and "Annex I Reef: Sabellaria spinulosa reef” to account for uncertainty in feature extent on sandbanks that are known to be mobile. The margins can be viewed in the Annex I sandbank layer provided on JNCC's MPA mapper, however these margins are not displayed in Natural England's MAGIC interactive mapper.
Legislation
Legislation behind the designation: EU Habitats Directive 1992 transposed into UK law by The Conservation of Offshore Marine Habitats and Species Regulations 2017 (as amended).
Protected Features
| Feature | Feature Type |
| 1170 Reefs | Annex I habitat |
| 1110 Sandbanks which are slightly covered by sea water all the time | Annex I habitat |
Specific information on the conservation objectives relating to this site is provided in the Conservation Advice section.
The acquisition of new data may result in updates to our knowledge on feature presence and extent within this site. The most up-to-date information is reflected on the map on this page and in JNCC’s MPA Mapper and the evidence underpinning this can be viewed in the Monitoring and Evidence section.
Site Timeline
The diagram below is a summary of the key milestones involved in the selection and designation of Haisborough, Hammond and Winterton SAC. More detail can be found in the Relevant Documentation section below.
Relevant Documentation
The documents referred to below and any other historical documents relating to Haisborough, Hammond and Winterton SAC were produced during the selection and designation process and therefore may be out of date. This Site Information Centre is the most up-to-date source of information for this MPA, and will reflect any additional information gathered since these documents were produced. Information about the SAC site selection process is available on JNCC's SAC webpages.
- Standard Data Form – Details the SAC and the designated features.
- SAC Selection Assessment Document – Overview of the SAC, designated features and rationale for site selection.
- Site Improvement Plan – Overview of the current and predicted issues affecting the condition of the site's protected feature and outlines the priority measures required to improve the condition of the feature. It does not cover issues where remedial actions are already in place or ongoing management activities which are required for maintenance.
- Post-consultation Report and Impact Assessment – Overview of the consultation outcomes, and an assessment of the environmental, social and economic costs and benefits of the designation.
- JNCC's formal conservation advice for this site is available in the Conservation Advice section below.
These resources are available on JNCC's Resource Hub.
Summary
Last updated: August 2020
The information for this site summary was adapted from documents listed in the Relevant Documentation section and incorporates any further information gathered since the documents were produced.
Site Overview
The Haisborough, Hammond and Winterton SAC lies off the north east coast of Norfolk, and contains a series of sandbanks which meet the Annex I habitat description for "Sandbanks slightly covered by sea water all the time". The central sandbank ridge in the site is composed of alternating ridge headland associated sandbanks. This ridge consists of the sinusoidal banks which have evolved over the last 5,000 years, originally associated with the coastal alignment at the time that the Holocene marine transgression occurred). The bank system consists of: Haisborough Sand, Haisborough Tail, Hammond Knoll, Winterton Ridge and Hearty Knoll. Hewett Ridge and Smiths Knoll form an older sequence of sandbank ridges located along the outer site boundary. In territorial waters are the Newarp Banks and North and Middle Cross Sands which lie on the south-west corner of the site. These banks are believed to be geologically recent, their genesis dating to around the 5th century AD. A margin of 500 m has been added around the edges of all sandbanks within the site to reflect current uncertainty in feature extent. As well as this margin an additional margin of 1,000 m has been added to the boundary of Middle and North Cross sandbank in the south-west of the site, to account for projected movement of the sandbank over a period of 10 years since bank delineation in 2010. While the areas inside these margins are not confirmed but potential feature, JNCC advises a precautionary approach to their management (i.e. treat them as if they were confirmed feature to ensure appropriate protection now and into the future).
The sandy sediments within the site are very mobile due to the strong tidal currents which characterise the area. Large-scale bank migration or movement appears to be slow, but within the sandbank system there is a level of sediment movement around, and also across, the banks. This is evidenced by megaripple and sandwave formations on the banks. Infaunal communities of the sandy bank tops are consequently of low biodiversity, characterised by mobile polychaetes and amphipods which are able to rapidly re-bury themselves into the dynamic sediment environments. Along the flanks of the banks, and towards the troughs between the banks the sediments tend to be slightly more stable with gravels exposed in areas. In these regions of the site infaunal and epifaunal communities are much more diverse. There are a number of areas where sediment movements are reduced and these areas support an abundance of attached bryozoans, hydroids and sea anemones. Other tube-building worms such as keel worms Pomatoceros sp. and sand mason worms Lanice conchilega are also found in these areas, along with bivalves and crustaceans.
Sabellaria spinulosa reefs are also a protected feature of the site and are located at Haisborough Tail, Haisborough Gat and between Winterton Ridge and Hewett Ridge. They arise from the surrounding coarse sandy seabed to heights of between 5 cm to 10 cm. The reefs are consolidated structures of sand tubes showing seafloor coverage of between 30% and 100% of the sediment. A margin of 500 m has also been applied to the point and line records of Sabellaria. Similarly, while the areas inside these margins are not confirmed but potential feature, JNCC advises a precautionary approach to their management (i.e. treat them as if they were confirmed feature to ensure appropriate protection now and into the future). Further detail on the evidence for this SAC can be found in the Monitoring and Evidence section.
Site location: Co-ordinates for this SAC can be found in the Standard Data Form listed in the Relevant Documentation section.
Site area: 1,467.59 km².
Site depth range: Depth at the site ranges from the top of the bank features that almost breach the sea surface down to 52 m below sea-level in the sandbank troughs.
Charting Progress 2 Biogeographic Region: Southern North Sea.
Site boundary description: The site boundary is a simple polygon enclosing the minimum area necessary to ensure protection of the Annex I habitat features. Co-ordinate points have been positioned as close to the edge of the interest features as possible, rather than being located at the nearest whole degree or minute point. Where it is justified to protect the features of the site from the effects of mobile gear on the seabed at some distance from a vessel on the surface, a margin in proportion to the water depth may be added to the extent of the feature when defining the site boundary. The SAC contains Annex I sandbanks at depths of predominantly <25 m below chart datum. Therefore, a margin of 100 m was used around each sandbank feature except where a straight line between two points was the more sensible option to avoid an over-complicated boundary following the UK guidance on defining boundaries for marine SACs for Annex I habitat sites fully detached from the coast.
Monitoring and Evidence
Last updated: November 2023
The full overview of the range of data used to support site identification, along with information on confidence in feature presence and extent is available in the Haisborough, Hammond and Winterton SAC Selection Assessment Document.
Survey and data gathering
- Southern North Sea Sandbanks Monitoring Survey (2017) Cruise Report – This collaborative survey between Cefas and JNCC covered three sites; Haisborough Hammond and Winterton SAC, Inner Dowsing, Race Bank and North Ridge SAC and North Norfolk Sandbanks and Saturn Reef SAC. This cruise report details the operations carried out onboard the survey, the aim of which was to acquire monitoring data to contribute to the development of a monitoring time-series for these three sites. Reporting of the data is underway and will be made available in due course.
- Inner Dowsing, Race Bank and North Ridge SAC and Haisborough, Hammond and Winterton SAC Survey Report (2016) – This report was commissioned as part of an inshore benthic marine survey of the Inner Dowsing, Race Bank and North Ridge SAC and Haisborough, Hammond and Winterton SAC.
- Inner Dowsing, Race Bank and North Ridge, Haisborough, Hammond and Winterton Special Areas of Conservation (SACs) Joint Wash Baseline Survey (2011): Cruise Report – JNCC, Natural England and Cefas worked together to identify the location, extent and condition of Annex I habitat features at these two sites. Acoustic, video and stills, sediment and faunal samples were collected and the habitats mapped.
Data analysis reports
- North Norfolk Sandbanks and Saturn Reef, Haisborough, Hammond and Winterton, Inner Dowsing, Race Bank and North Ridge Special Areas of Conservation (SAC) Monitoring Report 2016 – This report presents the findings of the first dedicated monitoring survey of the Inner Dowsing, Race Bank and North Ridge (IDRBNR) SAC, Haisborough, Hammond and Winterton (HHW) SAC and the North Norfolk Sandbanks and Saturn Reef (NNSSR) SAC, which will form the initial point in a monitoring time series against which feature condition can be assessed in the future.
- Benthic Survey of Inner Dowsing, Race Bank and North Ridge SAC and of Haisborough, Hammond and Winterton SAC (2013) – This report by Cefas describes results from the 2011 baseline survey that aimed to identify the location, extent and condition of Annex I habitat features by collecting feature-targeted acoustic sidescan, multibeam and ground-truthing data. The cruise reports (Whomersley et al. 2011) and additional information from the Humber and East Coast Regional Environmental Characterisation (REC) reports (Tappin et al. 2011; Limpenny et al. 2011) are also available.
- East Coast Regional Environmental Characterisation (2011) – A multidisciplinary marine study by Limpenny et al. (2011) into the geology, biology and archaeology of an area covering approximately 3,300 km2 of the seabed off East Anglia. The study was conducted over a three-year period and has been funded by the Marine Aggregate Levy Sustainability Fund.
- Appraisal of the occurrence of Annex I sandbank habitat (2008) – An initial appraisal of the occurrence of Annex I sandbank habitat was completed on Natural England’s behalf by Entec UK Ltd in 2008. This work examined data from a variety of sources including windfarm and aggregate surveys, dedicated survey and modelling.
- Potential cumulative impacts of aggregate dredging (2007) – Investigated the potential cumulative impacts of aggregate dredging on faunal communities and sediment composition by collecting benthic grab samples. Analysis by Cooper et al. (2007) for faunal and sediment composition to determine the cumulative impacts of aggregate dredging at multiple sites off the coast of Great Yarmouth, including locations within this SAC.
- Hanson Aggregates Marine Limited (2005) – Survey to examine impacts of dredging 5 years post-dredging activity to produce an Environmental Statement for an aggregates dredging project within the SAC. The survey provides sediment particle size and faunal data for a localised area within the SAC.
Additional relevant literature
References for further supporting scientific literature consulted during the identification of this site can be found in the Selection Assessment Document found in the Relevant Documentation section. Please be aware that although these sources contain information in relation to this MPA, they do not necessarily represent the views of JNCC.
Knowledge gaps
As part of the UK Marine Monitoring and Assessment Strategy (UKMMAS), JNCC led the development of a UK Marine Biodiversity Monitoring Strategy, working with partners across the UK monitoring community. The Strategy spans UK territorial and offshore waters, focusing on biodiversity in the wider environment and within Marine Protected Areas. Its aim is to implement efficient, integrated monitoring of marine biodiversity to provide the evidence needed for all the UK's policy drivers.
The evidence collected during MPA monitoring surveys is used in combination with other available evidence to:
- Enable assessment of condition of the features within sites;
- Contribute to the assessment of the degree to which management measures are effective in achieving the conservation objectives for the protected features;
- Support the identification of priorities for future protection and/or management; and,
- Enable Government to fulfil its national and international assessment and reporting commitments in relation to MPAs and help identify where further action may be required.
More detail on offshore MPA monitoring can be found on the Offshore MPA monitoring webpage. A list of monitoring surveys and relevant reports can be found on the MPA monitoring survey reports webpage.
If you are aware of any additional information not referred to in the Relevant Documentation section, please contact us.
Conservation Advice
Last updated: May 2023
JNCC and Natural England have prepared joint draft conservation advice for Haisborough, Hammond and Winterton SAC. This advice is available through Natural England’s Designated Sites System for Haisborough Hammond and Winterton SAC. Natural England, in consultation with JNCC, are undertaking a pilot project that explores a new approach to updating its supplementary advice on conservation objectives for Haisborough, Hammond and Winterton SAC. For more details please see the site's Designated Sites System page.
The advice reflects the most up-to-date evidence held by both Natural England and JNCC and must be taken into consideration when undertaking an assessment of the effects which a planned activity can have on the site’s integrity and when making decisions regarding management and consenting of marine activities in or near the site.
For more information on JNCC’s approach to conservation advice please see the 'Conserving MPAs' webpage. Information can also be found on Natural England's website.
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