Today's expected timetable for today?
If you check with real time trains -
http://www.realtimetrains.co.uk - that will give you an excellent timetable for today, combining all train companies services, engineering changes, special, freights, etc. Click on individual services at a station to see their full schedule, and to see how well they are doing / did once they've run. An excellent site.
For schedules and ticket costs, use
http://www.gwr.com