It's 15 mins drive into Oxford city centre and 55 mins on a train from OXF to Marylebone station in central London, not into Oxford! Just 5 mins to 10+decent hotels in Woodstock from terminal/FBO for crew.
Remind me (as an Oxfordshire (not London) born chap but now Biggin based) what Woodstock has to offer crew? A few good pubs and no shops? It's still nearly 10 miles in a cab to Oxford, with no mainstream shops to walk to. Crews don't only want a good hotel. We also want some facilities nearby, not a per diem busting ride away. 10 MPH to/from Biggin? You must have used the wrong cabs.
80+ MPH? Have the limits changed?