| Name/Location | County | Open | Close | Comment |
| 1066 Country Brewery | . | . | . | See White |
| 1648 BREWING, East Hoathly | E Sussex | 2004 | . | Located at The Kings Head PH |
| ABBEY, Retford | Nottinghamshire | 1982 | 1985 | Plant sold to Wye Valley |
| ABBEY, Stainton | S Yorkshire | 1981 | 1982 | Plant moved to Abbey, Retford |
| ABBEY ALES, Bath | Somerset | 1997 | . | . |
| ABBEY BELLS, Hirst Courtney, Selby | N Yorkshire | 2002 | . | . |
| Abbey Brewery | . | . | . | See Wm Younger |
| ABBEYDALE, Sheffield | S Yorkshire | 1996 | . | Plant ex Leaking Boot |
| ABEL BROWN'S, Stotfold | Bedfordshire | 1995 | 1997 | Located at The Stag Tavern |
| ABERDEEN ALES, Alford | Grampian | 1982 | 1986 | Devanha Brewery |
| ABERDEENSHIRE, Ellon, Aberdeenshire | Grampian | 1995 | 1997 | . |
| ABERYSTWYTH ALES, Llanrhystud | W Wales | 1994 | 1996 | . |
| ABINGTON PARK, Northampton | Northamptonshire | 1984 | 1997 | Clifton Inns (Watneys) pub brewery. Ex Chef & Brewer. Acquired by S&N (Trent Inns) 1993 |
| ABRAHAM THOMPSON, Barrow-in-Furness | Cumbria | 2004 | . | . |
| ACORN, Wombwell, Barnsley | S Yorkshire | 2003 | . | . |
| ADNAMS, Southwold | Suffolk | 1872 | . | Sole Bay Brewery. Site recorded as brewing since 1343. IFBB Member |
| AFAN, Port Talbot | Glamorgan | 1982 | 1984 | . |
| AIREDALE, Castleford | W Yorkshire | 1997? | 1998? | Did it brew commercially? |
| Albion Brewery | . | . | . | See Oldham |
| Albion Brewery | . | . | . | See Watneys, Whitechapel |
| ALCAZAR, Old Basford | Nottinghamshire | 1999 | . | Formerly Fiddlers ales. Located at The Fox & Crown PH |
| ALCESTER, Alcester? | Warwickshire | Unconfirmed | . | Source: Quaffale - Future Breweries |
| ALCHEMY, Hersham | Surrey | 1998 | 2001 | Plant ex Mordue |
| ALDCHLAPPIE, Kirkmichael | Tayside | 1996 | 1999? | Located at The Aldchlappie Hotel |
| ALE HOUSE, Leeds | W Yorkshire | 1987 | 1994 | Off licence brewery. Plant sold to Brewlab |
| ALES OF KENT, Boxley, Maidstone | Kent | 1999 | 2002 | Moved from Chatham 2000. See also Four Alls |
| ALES OF SCILLY, St Mary's | Isles of Scilly | 2001 | . | . |
| ALEWIFE, Starston, Harleston | Norfolk | 2000 | 2004 | Mainly bottle conditioned |
| Alexandra | . | . | . | See Becketts, Portslade |
| ALFORD ARMS, Frithsden | Hertfordshire | 1993 | 1995 | Located at The Alford Arms (Whitbread). Also brewed 81-83 |
| ALICE, Inverness | Highlands | 1983 | 1987 | Plant shipped to the USA |
| ALL GATES, Wigan | Gtr Manchester | Unconfirmed | . | Source: Quaffale - Future Breweries |
| ALL NATIONS, Madeley | Shropshire | 1789 | 2000 | Aka Mrs Lewis's. One of only 4 brewpubs in 1971. See also Worfield |
| All Saints Brewery | . | . | . | See Melbourn Brothers |
| Alloa Brewery | . | . | . | See Arrol |
| ALLSOPP, Burton-upon-Trent | Staffordshire | 1994? | 1998? | Micro brewery within Ind Coope. Aka Samuel Allsoppp. Sold to Bass 1998? |
| ALTRINGHAM, Altringham | Gtr Manchester | 1999 | 2004? | Located at The Old Market Tavern. Aka Cheshire Cat Ales. Seeking new premises |
| AN TEALLACH ALE Co, Little Loch Broom, Ullapool | Highlands | 2003 | . | . |
| ANCHOR, Kings Lynn | Norfolk | Unconfirmed | . | Proposed brewery at The Crown & Mitre. Source: Quaffale - Future Breweries |
| Anchor Brewery, Horsleydown | . | . | . | See Courage |
| Anchor Brewery, Mile End | . | . | . | See Charrington |
| ANCIENT DRUIDS, Cambridge | Cambridgeshire | 1984 | 1996 | Owned by Wells. Plant moved to Cox's Yard |
| Anglesey | . | . | . | See Ynys Mon |
| ANGLO DUTCH, Dewsbury | W Yorkshire | 2000 | . | Plant ex Rat & Ratchet |
| Ann Street | . | . | . | See Jersey |
| ANSELLS, Birmingham | W Midlands | 1857 | 1981 | . |
| Anvil Brewery | . | . | . | See Hydes |
| APPLEBY NEW, Appleby in Westmorland | Cumbria | 1979 | 1980 | See also Westmorland |
| Arbennig o Geredigion | . | . | . | See Bragdy Ceredigion |
| ARCHERS, Swindon | Wiltshire | 1979 | . | Moved 1996. Owned by Burns Leisure 1999-2001 |
| ARGYLE, Leith, Edinburgh | Lothian | 1985 | 1986 | Plant & site ex Leith |
| ARKELLS, Swindon | Wiltshire | 1843 | . | IFBB Member |
| ARRAN, Brodick, Isle of Arran | Highlands | 2000 | . | Plant ex Tipsy Toad Town House, Jersey. Aka Isle of Arran |
| ARROL, Alloa | Central | 1866 | 1998 | Alloa Brewery. Acquired by Samuel Allsopp (Tetleys) 1930 |
| ARUNDEL, Arundel | W Sussex | 1992 | . | Plant ex Woods. Merged with Weltons North Downs 1999 |
| ASH VINE, Frome | Somerset | 1987 | 2000 | Moved from Wellington 1989 & from the White Hart, Trudoxhill 1997. Also brewed for Quality Cask Ales. See also Kestrel & Heritage Ales |
| ASHFORD, Ashford | Kent | 1983 | 1985 | Same ownership as Kentish Ales |
| ASHURSTWOOD, East Grinstead | W Sussex | 1983 | 1988 | Located at The Threee Crowns (Watneys/Phoenix) |
| Aspinalls | . | . | . | See Cambrinus |
| ASTON MANOR, Birmingham | W Midlands | 1983 | . | Bottled cider specialists. No real ale since 1996. See also Highgate. |
| Atlas | . | . | . | See Preston |
| ATLAS, Kinlochleven | Highlands | 2002 | . | Plant ex Flag & Firkin, Watford. Formed Highlands & Islands Breweries with Atlas 2004 |
| AVIEMORE, Aviemore | Highlands | 1997 | 2001 | See Cairngorm |
| AXE VALE, Colyton | Devon | 1983 | 1986 | . |
| AXMINSTER, Axminster | Devon | 1988 | 1989 | Plant ex Hardington (Glous) |
| AYRSHIRE, Stevenston | Strathclyde | 1981 | 1982 | . |