RAJAR minimum RAJAR minimum Mux area TSA sample period Mux area TSA sample period Aberdeen Northsound 1 Annual N Cumbria C.F.M Annual Birmingham Free Radio FM Half yearly N Ireland Downtown Radio Half yearly B'mouth Fire Radio Annual Norfolk BBC Radio Norfolk Half yearly Borders Radio Borders Annual North Wales Heart North Wales Half yearly Bradford Pulse 1 Half yearly North Yorkshire BBC Radio York Half yearly Bristol BBC Radio Bristol Half yearly Northamptonshire BBC Radio Northampton Half yearly Cambridge / Heart Nottinghamshire BBC Radio Nottingham Half yearly Peterborough Cambridgeshire Half yearly Oxfordshire BBC Radio Oxford Half yearly Cardiff Capital South Wales Half yearly Central Lancs Rock FM Half yearly Pembrokeshire 102.5 Radio Pembrokeshire Annual Ceredigion Radio Ceredigion Annual Reading & Cornwall BBC Radio Cornwall Half yearly Basingstoke BBC Radio Berkshire Half yearly Coventry Free Radio Half yearly S Hants Total BBC Radio Solent Annual Derbyshire BBC Radio Derby Half yearly S W Scotland West Sound Annual Devon BBC Radio Devon Half yearly Salisbury Spire FM Annual Edinburgh Forth 1 Half yearly Sheffield Hallam FM Half yearly Essex BBC Essex Half yearly Shropshire BBC Radio Shropshire Half yearly Glasgow Clyde 1 Half yearly Somerset BBC Somerset Half yearly BBC Radio Stoke on Trent Signal One Half yearly Gloucestershire Gloucestershire Half yearly Suffolk BBC Radio Suffolk Half yearly Hereford & BBC Hereford & Surrey Eagle Radio Half yearly Worcester Worcester Half yearly Sussex Heart Sussex Half yearly BBC Three Counties Swansea 96.4 FM The Wave Annual Herts, Beds, Bucks Radio Half yearly BBC Radio Humberside Viking FM Half yearly Swindon & W Wilts Wiltshire/Swindon Half yearly Inverness Moray Firth Radio Annual Tayside Tay FM Annual Kent BBC Radio Kent Half yearly Teesside TFM Radio Half yearly Leeds Radio Aire Half yearly Tyne & Wear Metro Radio Half yearly Leicestershire BBC Radio Leicester Half yearly W Dorset Wessex FM Annual Lincolnshire Lincs FM Half yearly Wolverhampton & London BBC London 94.9 Quarterly Shropshire Free Radio FM Annual Manchester Key 103 Half yearly