Brewers staff and supporters encouraged Bournemouth fans to celebrate promotion to League One at the Pirelli Stadium in April 2010, allowing the traveling contingent to enter the pitch after the final whistle to applaud their side's achievement.
After the 1.30pm postponement of Saturday’s FA Cup third round tie, Bournemouth fans David Whitehead and Adrian Lee set up a fund raising page online in a bid to repay the favour and fund supporter travel to the rearranged tie.
With the fundraising total now approaching a staggering £3000, Mostyn was keen to emphasise how proud he is of the Cherries supporters' efforts to ensure their fellow football fans can attend the tie at the Goldsands Stadium on Tuesday 14th January.
“When I heard, I was practically as emotional as I was on that famous day in 2010 when we were promoted!” he told afcb.co.uk. “It’s just the most incredible gesture and I think it’s probably unprecedented in football for supporters to be so generous.
“On that day when we were promoted, after years of grief and struggling, for Ben (Robinson, Burton chairman) and all of his staff, the groundsmen and the stewards, to let us have the run of the ground was something that was incredible.
“Stewards by their very nature are designed to hold crowds at bay but they were joining in the celebrations as well, and our supporters have never forgotten it.
“It’s an incredible gesture and I want to make it quite clear that this was an idea of the fans, not of the board.
"There have been a lot of great occasions that have given me a great sense of pride, but nothing has given me a greater sense of pride than to support this incredible gesture from our supporters.”
Mostyn, whose personal relationship with Burton chairman Robinson has blossomed since the infamous day in April 2010, also added how disappointed he was with Saturday’s postponement.
“I had Ben in the boardroom with his wife Lesley on Saturday along with Greg Dyke (FA chairman), so although the game was postponed we decided we would have lunch and a bottle of wine just to reciprocate the hospitality they so kindly afforded us at the Pirelli Stadium.
“It was in pretty good spirit, and of course it was one of those rare occasions in the boardroom that you could enjoy a bottle of wine because nobody was going to leave the stadium a loser!
“Everybody associated with the club was disappointed. But at the end of the day the referee is the person that makes the decision, we have no influence on that, so you just have to grin and bear it and move on to the rearranged game a week on Tuesday.”