Operator: Thameslink
Coaches:
(12)
(12)
Previous Calling Points:
| 03:15 | Bedford | On time | |
| 03:26 | Flitwick | On time | |
| 03:30 | Harlington | On time | |
| 03:36 | Leagrave | On time | |
| 03:40 | Luton | On time | |
| 03:43 | Luton Airport Parkway | On time | |
| 03:49 | Harpenden | On time | |
| 03:55 | St Albans | On time | |
| 04:01 | Radlett | On time | |
| 04:04 | Elstree & Borehamwood | On time | |
| 04:08 | Mill Hill Broadway | On time | |
| 04:12 | Hendon | On time | |
| 04:14 | Brent Cross West | On time | |
| 04:17 | Cricklewood | On time | |
| 04:20 | West Hampstead Thameslink | On time | |
| 04:24 | Kentish Town | On time | |
| 04:32 | London St Pancras (Intl) | On time | |
| 04:40 | London Blackfriars | On time | |
| 05:07 | East Croydon | On time | |
| 05:13 | Purley | Delayed | actual 05:15 |
| 05:28 | Horley | Unknown | |
| 05:32 | Gatwick Airport | Unknown |