Overview of service alterations
| Monday 23 December | A normal service will operate |
| Tuesday 24 December | A normal service will operate until 13:00 From 13:00 a reduced service will operate |
| Wednesday 25 December | No service |
| Thursday 26 December | No service. A Southern service will operate between Gatwick Airport and London Victoria |
| Friday 27 December | A Saturday service will operate |
| Saturday 28 December | A reduced service will operate |
| Sunday 29 December | A reduced service will operate |
| Monday 30 December | A Saturday service will operate |
| Tuesday 31 December | A Saturday service will operate |
| Wednesday 1 January | A reduced service will operate |
| Thursday 2 January | A normal service will operate |