[Bigbrotherin]

Only tell them as they leave, during their evictions. Tell the winner once he's out. Or get Davina on the night of the last eviction she could say "Housemates, next week as you know, is the big brother final. Big brother and the voting public would like to inform housemates that there is a second prize fund and that the winner will recieve it". The first one is better if you want to see a good interview and the second one is better if you want a bitchy last week. If big brother gave the winner the money whilst on air, it would be a hell of a lot better to have this twist.