In total, 22 MPs and two Peers are set to run, including former Health Secretary Matt Hancock, the Shadow Minister for Planning Ruth Cadbury, and Labour’s Mayor of South Yorkshire Dan Jarvis. A record-equalling four female MPs will be taking part, plus Baroness Liz Sugg making her London Marathon debut.
The previous record of running MPs was 17 in 2018.
This year sees 17 Conservatives running, five Labour and two Scottish National Party representatives.
A cross-party battle is likely to see either Alex Norris (Labour) or Tom Pursglove (Conservative) take the title for fastest MP, after the two crossed the line within 20 seconds of each other in 2019. Norris won that year in a time of 3:57:25 with Pursglove finishing marginally behind him in a time of 3:57:42.
| First name | Surname | Party | Constituency | PB |
| Duncan | Baker | Conservative | North Norfolk | Debut |
| Scott | Benton | Conservative | Blackpool South | Debut |
| Ruth | Cadbury | Labour | Brentford and Isleworth / Shadow Minister for Planning | 4:57:13 (2019) |
| Alun | Cairns | Conservative | Vale of Glamorgan | 3:28:02 (2016) |
| Greg | Clark | Conservative | Tunbridge Wells | Debut |
| James | Duddridge | Conservative | Rochford and Southend East | 4:36:50 (2019) |
| Nick | Fletcher | Conservative | Don Valley | Debut |
| Chris | Green | Conservative | Bolton West and Atherton | 4:14:22 (2019) |
| Matt | Hancock | Conservative | West Suffolk | Debut |
| Dan | Jarvis | Labour | Barnsley Central/Mayor of South Yorkshire | 3:44:55 (2015) |
| David | Linden | SNP | Glasgow East | 5:20:54 (2018) |
| Stuart | McDonald | SNP | Cumbernauld, Kilsyth and Kirkintilloch East | 3:58:31 (2018) |
| James | Morris | Conservative | Halesowen and Rowley Regis | 4:25:31 (2019) |
| Charlotte | Nicols | Labour | Warrington North | Debut |
| Alex | Norris | Labour | Nottingham North | 3:57:25 (2019) |
| Tom | Pursglove | Conservative | Corby | 3:57:42 (2019) |
| Will | Quince | Conservative | Colchester | Debut |
| Paul | Scully | Conservative | Sutton and Cheam | Debut |
| Cat | Smith | Labour | Lancaster and Fleetwood | Debut |
| Amanda | Solloway | Conservative | Derby North/Science Minister | 6:55:45 (2017) |
| Edward | Timpson | Conservative | Eddisbury | 3:42:24 (2014) |
| Lord Ed | Vaizey | Conservative | (Didcot) | Debut |
| James | Wild | Conservative | North West Norfolk | 3:33:33 (2009) |