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| Agency | Address | clients |
 | 10 Twenty Two Casting | PO Box 1022, Liverpool, L69 5WZ | 5 |
 | 2020 | 2020 Productions Ltd., 2020 Hopgo... | 7 |
 | 21st Century Actors Management | 206 Panther House, 38 Mount Pleas... | 7 |
 | 247 Talent | 36 Coombe Rise, Brighton, BN2 8QN | 10 |
| 41 Management | 3rd Floor, 74 Rose Street Lane No... | 7 |
 | 9ine Partners Ltd | 205 Askew Road, Starch Green, She... | 2 |
| A & B Personal Management | Paurelle House,, 91 Regent Street... | 6 |
 | A & J Management | 242a The Ridgeway, Botany Bay, En... | 28 |
| A & M Agency | 130 Siringo Road, Suite 202, Sant... | 1 |
| A.D.A Enterprises | 78 St Margarets Road, Twickenham,... | 1 |
| Academy Castings | Blue Square, 272 Bath Street, Gla... | 7 |
 | Accent Bank | 420 Falcon Wharf, 34 Lombard Road... | 4 |
 | Access Artiste Management | PO Box 39925, London, EC1V 0WN | 29 |
 | Acting Out Casting | dolphin house, 2-5 manchester str... | 4 |
 | Actors Direct | Gainsborough House, 109 Portland ... | 18 |
| Actors International | Conway Hall,, 25 Red Lion Square,... | 32 |
| Actors Ireland | 2-4 University Road, Belfast, BT7... | 4 |
| Actors World Casting | W13 0HH | 44 |
 | Actors' Creative Team | Panther House, 38 Mount Pleasant,... | 11 |
| After Dark Management Agency | 12 Laurel Court, The Penthouse Su... | 5 |
| Alan Sharman Agency | P2 Wexler Lofts, 100 Carver Stree... | 4 |
 | All Talent UK | Central Chambers, 93 Hope Street,... | 14 |
 | Allsorts Agency | Suite 1 & 2 Marloborough Business... | 7 |
 | Alternativ Model Management | Parr Street Studios, 33-45 Parr S... | 1 |
| Alvarez Management | 33,Ludlow Way, East finchley, Lon... | 6 |
| ALW Associates | 1 Grafton Chambers, Grafton Place... | 22 |
| am:pm the actors' agency | South 2 Central Park, 33 Alfred S... | 15 |
| Amanda Andrews Agency | 30 Caverswall Road, Blythe Bridge... | 30 |
| Amanda Sarosi Associates | 1 Hombury View, E5 9EG | 4 |
| American Agency | 14 Bonny Street, London NW1 9PG, ... | 22 |
| ANA Actors | 55 Lambeth Walk, London, SE11 6DX | 9 |
 | Andrea Wilder Agency | 23 Cambrian Drive, Colwyn Bay, Co... | 8 |
| Andrew Manson Personal Management | 288 Munster Road, London, SW6 6BQ | 17 |
 | Anna Lee Garrett Personal Management | 24/26 Arcadia Avenue, Finchley Ce... | 12 |
| Anna McCorquodale | 43 St Maur Road,, London, SW6 4DR | 15 |
| annas management | 25 Tintagel drive, stanmore middx... | 2 |
| Another Tongue | 10-11 D'Arblay St, London, W1F 8PS | 1 |
 | APM Associates | Pinewood Studios, Iver Heath, Buc... | 46 |
| Arena Personal Management | Panther House,, 38 Mount Pleasant... | 7 |
 | Aspire Agency @ StageAbility | Vestry Hall, St. Michael's Lane, ... | 3 |
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