so wait for official final results before saying anything?
Wait until your great grand children are gathered around your death bed, it will make an entertaining set of last words.
"Children, listen well. I was equal fourth in a student 10 mile TT in 2017, not fifth"
You could ask for clarification from Oxford Uni / CTT? Could just be an admin/timekeeper error? My Garmin time was about 10 seconds faster than the official time on Saturday so could be worth a shout?
Wait until your great grand children are gathered around your death bed, it will make an entertaining set of last words.
"Children, listen well. I was equal fourth in a student 10 mile TT in 2017, not fifth"