A Wycombe supporting work colleague said Tyson was superb for the time he was on the pitch. The fastest player he's ever seen, apparently (obviously doesn't remember Reading's 1980s winger Michael Gilkes).
Assuming the Chairboys haven't damaged Nathan too badly it really would be worth McGhee's while giving John Madejski a call. Shouldn't be a problem, they are friends again these days - I saw them having a meal in a Pangbourne restaurant before Christmas!