Making the BBC Singers (Britain's only full-time professional choir) redundant is part of the BBC's new strategy for classical music.
I thought that was sad anyway, especially as it would have been their Centenary next year, but to not have them for the Proms this year just seems a really nasty decision. They think their last performance will be in July (article here), so I can't believe they couldn't afford them for six weeks longer.
Yes, they can feature other choirs and make up choral groups of freelancers but to not let them have a "goodbye" when they've always been a big part of the Proms doesn't seem right to me.