My subcategories for places in Britain were a bit too fine-grained, and as such there were too many of them. Consequently I’ve replaced them with larger regions, which contain the counties listed below. Wales and Scotland remain as entities, and London is retained for the whole area inside the M25.
Cornwall, Devon, Somerset, Bristol, Gloucestershire, Dorset, Wiltshire
Bedfordshire, Kent, Sussex, Hampshire, Isle of Wight, Berkshire, Surrey, Oxfordshire, Hertfordshire
Norfolk, Suffolk, Essex, Cambridgeshire
Herefordshire, Worcestershire, Shropshire, Birmingham, Staffordshire, Derbyshire, Leicestershire, Nottinghamshire, Warwickshire, Rutland, Lincolnshire
Yorkshire, County Durham, Tyne & Weir, Northumbria
Cheshire, Merseyside, Greater Manchester, Lancashire, Cumbria