I was the dealer in the game!
What's not mentioned is it is indeed a Dealers Choice cash game, hand was NLHE, and we have a zero disclosure rule for cash game poker, hands are dead when intentionally exposed, or declared verbally. Thinking about the situation, I should of stopped the action when Bunner announced his hand, and instructed him if he did indeed have 89 he should now muck his hand in order to reclaim the £7 river bet, as there was sufficient time between the river bet and the other player calling to do this, with the remainder of the pot going to the other player, in that respect, I will be quite happy to return your £7 river bet on this occasion, as a token gesture therefore it shall be free entry to your next £8 Tournament ;-)
With regards to the Diamonds, I believe the Turn was a 7d, not 7h, making a three card diamond board.
EDIT: I cannot for the life of me remember an onlooker discussing the hand, if I had caught it I would of been down on them also. We started cash games with players allowed to show others their hands, but it was far too open to abuse, so we needed a serious crackdown, by not allowing intentional exposure, which has been the case for (almost) a year.
Stu