os 01 - Cornwal
os 02 - North York Moors, Yorkshire Wolds
os 03 - Lake District & Cumbria
os 04 - Peak District & Derbyshire
os 05 - Devon & Somerset
os 06 - Yorkshire Dales & North Yorkshire
os 07 - Hampshire & the Isle of Wight
os 08 - the Cotswolds & Gloucestershire
os 09 - Dorset, Somerset, Bath & Bristol
os 10 - North & Mid-Wales
os 11 - South & Mid-Wales
os 12 - Scotland
os 13 - Oxfordshire & Berkshire
os 14 - Northumberland
os 15 - London including the m25
os 16 - Beds, Bucks & Herts
os 17 - Essex & NE London
os 18 - Surrey, E & W Sussex
os 19 - Kent & SE London
os 20 - Norfolk
os 21 - Suffolk
os 22 - Wiltshire
os 23 - Herefordshire & worcestershire
