I cannot say whether Wedge did or did not pull the Y&B, but my initial view (based on statistics as much as anything else) was that an uncommanded ejection seemed extremely unlikely.
However, at a rare School of FC lunch one day at Boulmer (mid-90s), the man himself was unexpectedly called upon by the assembled masses to tell his tale and he did so lucidly and pretty convincingly.
The one message I took away was that he was just as pissed off about MB's (?) failure to locate the seat as they were, but for the opposite reason.
The failure subsequently to give him a tie seemed to me to be a bit mean, though I don't recall him being particularly bothered by it - I doubt he would have worn it in any case.