Unit would have been 165122. Southbound away from Oxford at 16:46 working 2Y84 15:22 Great Malvern to Didcot. Would have then worked 3E95 17:15 Didcot to Oxford.
As an aside, had a look at the TT for some of those stations on the Cotsword Line and they only see one train in each direction on weekdays! 2E93 06:53 Worcester Foregate Street to Oxford and the 2E95 return to Great Malvern.