i reckon you've gone too far with even that speculation. I will speculate that some heard Harvey's were renegotiating the supply contract and someone took that to mean they might not be supply anymore, and someone else took that to mean they wouldnt be supplying any more.
Or, someone outright...
ive missed several pages, has there been any suggestion from granny weatherwax why it is due to go? without a good reason i dont see this rumour has any credibility.
i cant believe this either... so im not going to untill announced. makes no sence whatso ever. the club know full well they'll lose substantial revenue if they dropped Harveys, and people wouldnt get early/stay late. and shirley Harvey's dont want to drop such a massive amount of sales.