If you are so interested and agitated and won't accept anyones answers other than those of the Trust why the hell don't you email/write/phone/text/message/fax or, god forbid, speak to the bloody Trust and ask them? Any dick on here can say they are on the board of the Trust.
I'm a dick on here who's definitely on the board of the Trust. I can't remember the last time the £10k was mentioned at a board meeting. I think the context when it was mentioned was when we had received another "telling off" email from the club about something or other, the comments were to the effect that the Trust's members were there when nobody else was and some senior people in the club had selective and/or memories. Just mentioned amongst the board, no action agreed about it, and then it wasn't mentioned again as far as I recall.
It happened before I joined around 3 years ago so I can't give details. I would probably be able give more had it been discussed to any degree during our meetings.
Reflecting on how things were at the time, if it were to happen now I would want unpaid staff to get paid as quickly as possible so I wouldn't be getting too fussed about drafting a legal agreement. You'd also be in a situation where new owners could say they didn't agree to the loan (the entity owning the club would be a different company in all probability anyway) and refuse to recognise it. So I'd also be prepared for it not to be returned in the event of the takeover not going ahead and the club ending up in even worse circumstances.
That's all I can say about it. It's genuinely not on my radar currently.