I will be traveling from London to oxford on business by hired car but my company can only reimburse me for train tickets! Where can I find used ones for the above route and the desired dates if possible?
The best idea is for you to purchase a rail ticket and make your journey in that manner . It is unlikely that anyone here will aid you in committing what is best known as fraud .
The cheapest cost by rail is only £10 round trip anyway.
The Oxford universities will be generally closed to visitors in May during exams.