Heating & Gas Engineers

Sheffield 21 Kingston upon Hull 15 Birmingham 13 Glasgow 12 Edinburgh 11 Slough 11 Bradford 10 Coventry 9 Stoke-on-Trent 9 Newcastle upon Tyne 8 Leicester 7 Nottingham 7 Belfast 7 Swansea 7 Blackburn 7 Huddersfield 7 Tamworth 7 Leeds 6 Liverpool 6 Milton Keynes 6 Southampton 6 Barnsley 6 Barrow-in-Furness 6 Sunbury-on-Thames 6 Warrington 6 Bristol 5 Derby 5 Manchester 5 Sunderland 5 Worcester 5 Blackpool 5 Burton upon Trent 5 Cannock 5 Darlington 5 Lowestoft 5 Poole 5 Falkirk 5 Llanelli 5 Brighton and Hove 4 Peterborough 4 Plymouth 4 Portsmouth 4 St Albans 4 Wakefield 4 Aberdeen 4 Bolton 4 Brentwood 4 Burnley 4 Cheltenham 4 Grays 4 Halifax 4 Nuneaton 4 Reading 4 Rochdale 4 West Bromwich 4 Worthing 4 Ayr 4 Kilmarnock 4 Broad Green 4 City of Westminster 3