| CD6 Machair |
| CM2 Upper salt marsh |
| FS Swamps |
| FS1 Reed and large sedge swamps |
| FS2 Tall-herb swamps |
| GA1 Improved agricultural grassland |
| GA2 Amenity grassland (improved) |
| GM1 Marsh |
| GS1 Dry calcareous and neutral grassland |
| GS2 Dry meadows and grassy verges |
| GS3 Dry-humid acid grassland |
| GS4 Wet grassland |
| HH3 Wet heath |
| HH4 Montane heath |
| PF Fens and flushes |
| PF1 Rich fen and flush |
| PF2 Poor fen and flush |
| PF3 Transition mire and quaking bog |