Readers may find the following background documents useful in understanding how the assessments have been made:
  1. Guidance from the European Commission on making conservation status assessments, especially the data matrices in the appendix.
  2. The approach taken by JNCC to reach these conclusions. 


The reporting format set by the European Commission requires assessment of the conservation status of each habitat on Annex I of the Directive.  The habitats for which the UK has responsibility are listed in the table below.  Two of these habitats (H6210 and H6211) are very similar and a combined assessment has been prepared for them (listed under H6210).

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Code Habitat Annex(es) Supporting information
Marine, coastal and halophytic habitats
H1110 Sandbanks which are slightly covered by sea water all the time I H1110 audit trail
H1130 Estuaries I H1130 audit trail
H1140 Mudflats and sandflats not covered by seawater at low tide I H1140 audit trail
H1150 Coastal lagoons I H1150 audit trail
H1160 Large shallow inlets and bays I H1160 audit trail
H1170 Reefs I H1170 audit trail
H1180 Submarine structures made by leaking gases I H1180 audit trail
H1210 Annual vegetation of drift lines I H1210 audit trail
H1220 Perennial vegetation of stony banks I H1220 audit trail
H1230 Vegetated sea cliffs of the Atlantic and Baltic coasts I H1230 audit trail
H1310 Salicornia and other annuals colonising mud and sand I H1310 audit trail
H1320 Spartina swards (Spartinion maritimae) I H1320 audit trail
H1330 Atlantic salt meadows (Glauco-Puccinellietalia maritimae) I H1330 audit trail
H1340 Inland salt meadows I H1340 audit trail
H1420 Mediterranean and thermo-Atlantic halophilous scrubs (Sarcocornetea fruticosi) I H1420 audit trail
Coastal sand dunes and continental dunes
H2110 Embryonic shifting dunes I H2110 audit trail
H2120 Shifting dunes along the shoreline with Ammophila arenaria (`white dunes`) I H2120 audit trail
H2130 Fixed dunes with herbaceous vegetation (`grey dunes`) I H2130 audit trail
H2140 Decalcified fixed dunes with Empetrum nigrum I H2140 audit trail
H2150 Atlantic decalcified fixed dunes (Calluno-Ulicetea) I H2150 audit trail
H2160 Dunes with Hippophae rhamnoides I H2160 audit trail
H2170 Dunes with Salix repens ssp. argentea (Salicion arenariae) I H2170 audit trail
H2190 Humid dune slacks I H2190 audit trail
H21A0 Machairs I H21A0 audit trail
H2250 Coastal dunes with Juniperus spp. I H2250 audit trail
H2330 Inland dunes with open Corynephorus and Agrostis grasslands I H2330 audit trail
Freshwater habitats
H3110 Oligotrophic waters containing very few minerals of sandy plains (Littorelletalia uniflorae) I H3110 audit trail
H3130 Oligotrophic to mesotrophic standing waters with vegetation of the Littorelletea uniflorae and/or of the Isoëto-Nanojuncetea I H3130 audit trail
H3140 Hard oligo-mesotrophic waters with benthic vegetation of Chara spp. I H3140 audit trail
H3150 Natural eutrophic lakes with Magnopotamion or Hydrocharition-type vegetation I H3150 audit trail
H3160 Natural dystrophic lakes and ponds I H3160 audit trail
H3170 Mediterranean temporary ponds I H3170 audit trail
H3180 Turloughs I H3180 audit trail
H3260 Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation I H3260 audit trail
Temperate heath and scrub
H4010 Northern Atlantic wet heaths with Erica tetralix I H4010 audit trail
H4020 Temperate Atlantic wet heaths with Erica ciliaris and Erica tetralix I H4020 audit trail
H4030 European dry heaths I H4030 audit trail
H4040 Dry Atlantic coastal heaths with Erica vagans I H4040 audit trail
H4060 Alpine and Boreal heaths I H4060 audit trail
H4080 Sub-Arctic Salix spp. scrub I H4080 audit trail
Sclerophyllous scrub (matorral)
H5110 Stable xerothermophilous formations with Buxus sempervirens on rock slopes (Berberidion p.p.) I H5110 audit trail
H5130 Juniperus communis formations on heaths or calcareous grasslands I H5130 audit trail
Natural and semi-natural grassland formations
H6130 Calaminarian grasslands of the Violetalia calaminariae I H6130 audit trail
H6150 Siliceous alpine and boreal grasslands I H6150 audit trail
H6170 Alpine and subalpine calcareous grasslands I H6170 audit trail
H6210 Semi-natural dry grasslands and scrubland facies: on calcareous substrates (Festuco-Brometalia) I H6210 audit trail
H6230 Species-rich Nardus grassland, on siliceous substrates in mountain areas (and submountain areas in continental Europe) I H6230 audit trail
H6410 Molinia meadows on calcareous, peaty or clayey-silt-laden soils (Molinion caeruleae) I H6410 audit trail
H6430 Hydrophilous tall herb fringe communities of plains and of the montane to alpine levels I H6430 audit trail
H6510 Lowland hay meadows (Alopecurus pratensis, Sanguisorba officinalis) I H6510 audit trail
H6520 Mountain hay meadows I H6520 audit trail
Raised bogs and mires and fens
H7110 Active raised bogs I H7110 audit trail
H7120 Degraded raised bogs still capable of natural regeneration I H7120 audit trail
H7130 Blanket bogs I H7130 audit trail
H7140 Transition mires and quaking bogs I H7140 audit trail
H7150 Depressions on peat substrates of the Rhynchosporion I H7150 audit trail
H7210 Calcareous fens with Cladium mariscus and species of the Caricion davallianae I H7210 audit trail
H7220 Petrifying springs with tufa formation (Cratoneurion) I H7220 audit trail
H7230 Alkaline fens I H7230 audit trail
H7240 Alpine pioneer formations of the Caricion bicoloris-atrofuscae I H7240 audit trail
Rocky habitats and caves
H8110 Siliceous scree of the montane to snow levels (Androsacetalia alpinae and Galeopsietalia ladani) I H8110 audit trail
H8120 Calcareous and calcshist screes of the montane to alpine levels (Thlaspietea rotundifolii) I H8120 audit trail
H8210 Calcareous rocky slopes with chasmophytic vegetation I H8210 audit trail
H8220 Siliceous rocky slopes with chasmophytic vegetation I H8220 audit trail
H8240 Limestone pavements I H8240 audit trail
H8310 Caves not open to the public I H8310 audit trail
H8330 Submerged or partially submerged sea caves I H8330 audit trail
H9120 Atlantic acidophilous beech forests with Ilex and sometimes also Taxus in the shrublayer (Quercion robori-petraeae or Ilici-Fagenion) I H9120 audit trail
H9130 Asperulo-Fagetum beech forests I H9130 audit trail
H9160 Sub-Atlantic and medio-European oak or oak-hornbeam forests of the Carpinion betuli I H9160 audit trail
H9180 Tilio-Acerion forests of slopes, screes and ravines I H9180 audit trail
H9190 Old acidophilous oak woods with Quercus robur on sandy plains I H9190 audit trail
H91A0 Old sessile oak woods with Ilex and Blechnum in the British Isles I H91A0 audit trail
H91C0 Caledonian forest I H91C0 audit trail
H91D0 Bog woodland I H91D0 audit trail
H91E0 Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae) I H91E0 audit trail
H91J0 Taxus baccata woods of the British Isles I H91J0 audit trail
No. of habitats = 77

There are 10 habitats included in the Gibraltar report, four of which are also recorded in the Atlantic/Marine Atlantic Biogeographic Region within the UK's territorial boundary.