Now that South Oxfordshire has moved into Tier 4, Going Forward Buses, which runs the twice weekly service to Didcot, has announced that it may have to alter or suspend its services at short notice. Please check its website for any such changes before travelling.
And a reminder that the new Thames Travel service starts on 4th January, linking Didcot with Long Wittenham, the Culham Science Centre and Berinsfield. There will be seven buses a day, five days a week, Mondays to Fridays. See the timetable on the Thames Travel website.