(1) | 20.76/+0.3 | CBP | Luke Dorrell | (Aldershot, Farnham & District AC) | 1 FINAL | Kingsmeadow Stadium | 11 May 2024 |
(2) | 21.02/+0.3 | | Derek Kinlock | (Croydon Harriers) | 2 FINAL | Kingsmeadow Stadium | 11 May 2024 |
(3) | 21.05/+2.8 | CBP | Luke Dorrell | (Aldershot, Farnham & District AC) | 1 HEAT 1 | Kingsmeadow Stadium | 11 May 2024 |
(4) | 21.10/+2.9 | | Derek Kinlock | (Croydon Harriers) | 1 HEAT 2 | Kingsmeadow Stadium | 11 May 2024 |
(5) | 21.17/+2.9 | | Brook Cronin | (Walton AC) | 2 HEAT 2 | Kingsmeadow Stadium | 11 May 2024 |
(6) | 21.2y | CBP | Mel Cheskin | (Polytechnic Harriers) | 1 FINAL | Motspur Park | 21 May 1966 |
| 21.2 | CBP | Cypren Edmunds | (Thames Valley Harriers) | 1 FINAL | Croydon Arena | 11 May 1996 |
(8) | 21.3/+0.6 | CBP | Phil Goedluck | (Belgrave Harriers) | 1 FINAL | Croydon Arena | 15 May 1994 |
| 21.3/+1.1 | | Ed White | (Sale Harriers) | 1 FINAL | Kingsmeadow Stadium | 10 May 1998 |
(10) | 21.32/+0.3 | | Brook Cronin | (Walton AC) | 3 FINAL | Kingsmeadow Stadium | 11 May 2024 |
(11) | 21.4/+0.3 | | Marlon Dickson | (Belgrave Harriers) | 1 FINAL | Kingsmeadow Stadium | 9 May 1999 |
| 21.4/+0.3 | | Kiran Gajjar | (Puma Thames Valley Harriers) | 2 FINAL | Kingsmeadow Stadium | 9 May 1999 |
(13) | 21.49/+0.3 | | Freddie Arkell | (Hercules Wimbledon AC) | 4 FINAL | Kingsmeadow Stadium | 11 May 2024 |
(14) | 21.5/0.0 | CBP | Michael Powell | (Shaftesbury Harriers) | 1 FINAL | Motspur Park | 21 May 1983 |
| 21.5 | =CBP | Donovan Reid | (Shaftesbury Barnet Harriers) | 2 FINAL | Tooting Bec | 21 May 1989 |
| 21.5/+1.1 | | Marlon Dickson | (Belgrave Harriers) | 2 FINAL | Kingsmeadow Stadium | 10 May 1998 |
| 21.5/-0.9 | | Marlon Dickson | (Belgrave Harriers) | 1 HEAT 2 | Kingsmeadow Stadium | 9 May 1999 |
(18) | 21.54/-0.4 | | Dwayne Dowding | (Herne Hill Harriers) | 1 FINAL | Kingsmeadow Stadium | 24 May 2014 |
(19) | 21.57/+0.9 | | Dwayne Dowding | (Herne Hill Harriers) | 1 S-FINAL 1 | Kingsmeadow Stadium | 24 May 2014 |
(20) | 21.6y/+3.0 | | Tony Tymms | (Surrey AC) | 1 FINAL | Motspur Park | 20 May 1967 |
| 21.6y/-1.0 | | Tony Tymms | (Surrey AC) | 1 FINAL | Motspur Park | 8 June 1968 |
| 21.6 | | Ian Matthews | (Sutton & Cheam Harriers) | 1 FINAL | Motspur Park | 19 May 1973 |
| 21.6/+4.6 | | Mike Powell | (Shaftesbury Harriers) | 1 FINAL | Motspur Park | 17 May 1986 |
| 21.6/+0.6 | | Terry Williams | (Shaftesbury Barnet Harriers) | 2 FINAL | Croydon Arena | 15 May 1994 |
| 21.6/+1.8 | | David McKenzie | (Shaftesbury Barnet Harriers) | 1 FINAL | Croydon Arena | 14 May 1995 |
| 21.6 | | Terry Williams | (Shaftesbury Barnet Harriers) | 2 FINAL | Croydon Arena | 11 May 1996 |
| 21.6 | | David McKenzie | (Shaftesbury Barnet Harriers) | 3 FINAL | Croydon Arena | 11 May 1996 |
| 21.6 | | Phil Goedluck | (Belgrave Harriers) | 4 FINAL | Croydon Arena | 11 May 1996 |
| 21.6/-0.9 | | Kiran Gajjar | (Puma Thames Valley Harriers) | 2 HEAT 2 | Kingsmeadow Stadium | 9 May 1999 |
| 21.60/0.0 | | Tim Abeye | (Belgrave Harriers) | 1 FINAL | Kingsmeadow Stadium | 10 May 2003 |
|
30 performances of 21.60 or better. |