In the run-up to Christmas, there will be major timetable changes coming to Great Western Railway services. On Sunday 15 December, new timetables will bring faster, more frequent services with thousands more seats across the network. https://www.gwr.com/plan-journey/timetable-2019
As well as the big changes from 15 December, there will also be a temporary timetable in place while Network Rail work on infrastructure upgrades over Christmas and New Year. This will affect services from Tuesday 24 December to Wednesday 1 January 2020 and includes the closure of Paddington station on Tuesday 24 December and Friday 27 December.
With train times changing please check the train timetable before you make your journey; details are on GWR.com/timetable2019 and there is more detailed information on https://www.gwr.com/travel-updates/planned-engineering/christmas.