The following Masters Clubs listed (in alphabetical order) are those that have been actively competing during the last five years.

Aberdeen, City of.
Acton, Gt. London
Addington, Bucks
Adwick, S. Yorks
Aireborough (Middlesborough)
Albyns, Essex
Alton, Hants
Amersham, Bucks
Amman Valley, Dyfed
Amphibians (Croydon)
Andover
Aqua Swim Squad
Arbroath
Arfon, Bangor
Arundell Trinity (West Sussex)
Ashbourne D
Ashford
Ashington, Northumberland
Atherton, Greater Manchester
Aylesbury
Bacup
Banbury
Barking
Barnet Copthall
Barnsley, Bo
Barnstable, Devon
Barrow, Cumbria
Barry ASC (Dragon Masters)
Basingstoke Hants
Bath Dolphin
Battersea, Greater London
Beacon, Devon
Beckenham
Bedford Beavers
Bedford Masters
Bedford Modernian
Bedwork, Warks
Belgrave
Belgrave, Leicestershire
Belper Marlin
Berts Lumbago
Bethnal Green (sharks), Greater London
Bexhill, East Sussex
Bexley, Kent
Bicester SC
Billingham
Birkenhead, Merseyside
Birmingham, City of
Bishops Stortford
Black Lion, Gillingham
Blackpool
Blackwater T, Hants
Blaenavon
Blyth, Northumberland
Bognor Regis
Boldmere
Bolton, Gt Man
BOSS
Boston
Bottisham, Cambs
Bournemouth Dorset
Bracknell
Bradford, City of
Braintree and Bocking
Brecon & District
Brent Dolphins, Suffolk
Bridgend
Brighton (Dolphins)
Brighton (Spencer)
Bristol
Bristol Central
Bristol Masters
Bristol North
Britannia
British Police
Broadway
Bromley SC
Broomfield Park, Broomfield Essex
Broomfield Park, Southgate,Greater London
Broomfield, Kent
Broxbourne
Burnley
Bury St. Edmunds (Beavers)
Caerphilly
Caldicot SC, Gwent
Cally Masters
Cambridge, City of
Camden Swiss Cottage
Camphill Edwardians, Kings Heath, Birmingham
Canterbury City of, Kent
Caradon, Cornwall (Launceston)
Cardiff Masters
Cardiff, CLAMS
Carlisle City SC
Chase, Cannock, Staffs
Chatteris, Cambs
Chelmsford, Essex
Chelsea & Kensington, London
Cheltenham
Chesham SC
Cheshunt, Herts
Chester, Cheshire
Chester-le-Street
Chipping Norton
Christchurch, Dorest (Seagulls)
Chorley Marl, Lancs
Cleveland (Middlesborough)
Clitheroe District
Coalville, Leicester
Colchester, Essex
Connahs Quay
Copeland ASC
Corby, Northants
Cork, Ireland
Coventry, City of, West Midlands
Crawley
Crewe
Cripps
Crompton CLA
Croydon Amphibians
Dagenham
Darlington Dolphin
Dartford, Kent
Darwen, Blackburn, Lancs
Daventry
Dawlish, Devon
Deal
Debden, Essex
Denham
Denham, Bucks
Derby Phoenix
Dereham Otters, East Dereham, Norfolk
Derham (Southend swim) ?
Derwentside (Matlock)
Devonport Royal Navy
Doncaster
Dorking
Douglas (IOM)
Dover
Dunstable SC
Durham City, Durham
Ealing, Gr. London
Ely
E.A.S.T, East Anglia Swallow Tails, Norwich
Eastbourne
Eastenbury
Eastwood, Notts
Eckington, Nr Sheffield ???
Edmonton Phoenix, Gt Lond.
Ellesmere Port
Elmbridge, H&W
Elmsbridge Phoenix
Ely, City of
Enfield Griffins
Epping Forest, Essex
Erith and District
Etwell/Etwall Eagle, Derbys.
Everton, Liverpool
Evesham, H & W
Fakenham, Falcon
Fareham Nomads
Faversham
Felixstowe
Fifolits
Fleetwood
Flint, Flints
Flitwick Dolphins, Beds (Mid Beds Squad)
Fontgary Flippers, Rhoose
Forfar
Forward Hill
Fox Hollies, Birmingham
Gainsborough
Gateshead and Wickham
Gillingham, Kent (Black Lion)
Glasgow Masters
Glasgow West
Glenalbyn, Dublin
Gloucester Masters
Godalming
Gosport Dolphins
Grantham, Lincs
Gravesend & Northfleet
Greenwich, Greater London
Griffins of Enfield, North London
Grimsby Santa Marina
Guernsey
Guildford CY
Guisborough
Gwent Police, Cwmbran
Haden Hill
Hadleigh, Suffolk
Hailsham East Sussex
Halstead, Essex
Hamilton, S. Lanarks
Hampshire Police, Farnborough
Harlow Penguins
Harrogate
Harrow & Wealdstone
Hart, Fleet, Hants
Hartlepool
Harwich, Essex
Haslemere
Haslington, Oxon
Hastings,Seagulls, E. Sussex
Hatfield, Herts
Havant & Waterlooville, Hants
Haverhill Hurricanes
Haywards Heath
Heads of the Valley SC, Ebbw Vale
Heart of England
Hearts, Scotland (Stirling)
Hebburn Met.
Hemel Hempstead
Herne Bay, Kent
Heston
Hillingdon Borough (Forward)
Hinckley
Hitchin, Herts
Hoddesdon SC, Herts
Holywell ASC, Oxon
Holywell, Dorset
Honiton, Devon
Houghton Regis, Luton/Dunstable, Beds
Hounslow Hurricanes
Howe Bridge Marlins, N Yorks
Hoylake
Huddersfield
Hull Masters
Hull District
Hythe, Kent
Ilford, Essex
Ilkley
Impington (Midland- Leamington)
Inverleith
Inverness, Highland
Isle Of Wight, Freshwater
Ipswich, Suffolk
Jersey DFS
Kelly College, Tavistock, Devon
Kenilworth Masters
Kettering
Kidlington & Gosford
Kingfisher (Southend swim)
Kings Hospital Dublin
Kings Cormorants, London
Kings Lynn Warriors
Kings School Canterbury
Kingsdown, Bristol
Kingston Royals
Kirklees, Bo (Newcastle)
Lakenheath, Suffolk
Lancaster University
Launceston, Cornwall
Leamington
Leatherhead SC
Leeds, City of
Leeds, East
Leeds, St Pauls Leicester Penguins
Leics Masters
Leighton Buzzard, Beds
Lewsey Masters, Luton
Lichfield, Staffs
Linslade Crusaders, Leighton Buzzard, Beds
Liverpool, City of
Llanelli
Lomond Masters
Long Eaton
Loughborough
Luton
Macclesfield
Maidenhead Marlin
Maidstone
Manchester
Mansfield
Margate, Kent
Market Harborough
Matlock District
Maxwell SC, Oxford
Melton Mowbray, Leicestershire
Mendip(Cheddar)
Met. Police (London)
Mid Beds Squad, Fliwick
Middlesborough
Mildenhall Sharks, Suffolk
Millenium
Milngavie (Motherwell)
Milton Keynes, City of
Monnow, Monmouth
Morley
Mote Park, Maidstone
Motherwell
Newark
Newburn
Newbury SC
Newcastle under Lyme
Newcastle, City of
Newham (Stratford, E Lond)
Newport and Maindee (MNO)
Newport Masters, Gwent
Newport Pagnell
Northampton SC
Northern
Norwich Penguins
Norwich Swan
Nottingham Leander
Nottingham, Nova
Numb Head Tri
Nuneaton, Warks
Oadby, Leics
Oddicombe, (Salcombe, Devon)
Ogwr Masters, Bridgend
Oldbury, Warks
Oldham Metro
Orion SC
Orpington
Otter
Out To Swim
Oxford, City of
Pencoed
Peterborough, City of
Plymouth, Port of, Devon
Pocklington
Pontypool Masters
Pontypridd
Poole
Portsmouth Northsea
Potters Bar
Preston, Lancs
Putteridge, Luton
RAFSA, Huntingdon
R C France
Reading
Reading Masters
Reading University
Redbridge, Uxbridge
Redditch
Redhill & Reigate
Regent Tiger (Jersey)
Retford
Rhoose, V Glam (Fontgary Flippers)
Rhyl
Rhymney Valley SC (RVSC)
Ripon, N Yorks
Rochdale Aquabears
Rochester, City of
Rochford & District, Essex
Romford Town
Romily Marina
Romsey & Totton. Hants
Rotherham MO
Royal Air Force SA, Huntingdon, Cambs
Royal Navy, Portsmouth
Royal Tunbridge Wells (RTW) Monsoon
Royton Blue Fins
Rugby Masters
Ruislip Northwood
Runcorn Reps
Runnymede (Egham, Surrey)
Rushcliffe
Rushden SC, Northants
Rushmore Royals, Farnborough, Hants
Ryedale
Rykneild ( Midland- Leamington Spa)
S. Yorkshire, Sheffield
Saffron Walden
St. Albans Masters
Salisbury, Wilts
Salopia (Shrewsbury ?)
Sans Egal, Surrey (Redhill & Reigate)
Sans Egal, Romford, Greater London
Satellite, Macclesfield
Scarborough
Crystal Palace SC
Sedgefield, Durham
Serpentine, London
Sevenoaks, Kent
Sheffield, City of
Shiverers, Hove/Southampton
Shrewsbury SC
Sittingbourne
Slough Eton Dolphin
Smiths Swim Squad, Eastbourne
Solent, Cowes
Solihull
South Lincs (Spalding)
Southend (SOS)
Southend STC, Borough of
Southgate, Gt Lond
Southport
Southwold, Bristol
Spencer Swim Team, Putney, London
Spondon SC
St. Albans
St. Austell
St. Ives, Cambs
St. Peters Port, Guernsey
Staines, Surrey
Stevenage, Herts
Stockport
Stourport, West Midland
Stowmarket, Suffolk
Street & District SC
Stroud Masters, Gloucs
Sudbury, Suffolk
Sundays Well
Sunderland, City of
Sutton Cheam
Sutton in Coalfield
Swanley (White Oak)
Swansea Otters
Swansea Valley
Swindon (SAMS), Wilts.
Taunton, Somerset
Tavistock SC
Teddington SC
Tenby, Pembs
Thames Valley AM (Reading)
Thanet Viking, Kent
Thetford Dolphins
Thornbury, W Yorks
Thornbury, Gloucs
Thurrock
Trafford Met.
Trident
Tring SC
Trowbridge Wilts
Tuff Fitty Tri
Ulverston, Cumbria
Univ. of London
Verulam, St Albans
Wakefield, City of
Walsall, W Mid.
Waltham Forest, Borough of
Waltham Forest Gators, Essex
Wantage
Ware, Herts.
Warley Wasps
Warrender, Edinburgh
Warrington Dolphins
Warrington Warriors
Warrington, Cheshire ( Bobcats)
Warwick University
Watford SC
Waveney Otters
Wear Valley
Wellingborough
Wellington, H & W
Welsh G'oldfish, Brecon
Wessex Walrus
West Dorset, (Lyme Regis)
West Dorest, (Dorchester)
Westminster, City of
Wetherby
Weyport, Weymouth, Dorest ( Masters)
White Oak, Swanley, Kent
Witham Dolphins, Essex
Whittlesey, Cambridgeshire
Winchester City Penguins
Winchester Hants
Wirral Metro, Birkenhead
Wisbech
Witney & District SC
Wolverhampton
Wolverhampton, Borough of
Wombourne, Wolverhampton
Woodspring Masters (Bristol)
Worcester
Wrexham
Wycombe District
Y Swim, (YMCA) London
Yarmouth, Gt.
Yeovil & District SC
YMCA (Y Swim) Central London
York City
Yorkshire, South, Sheffield