Rev Richard Coles was dancing a can can in black & silver spangly leotard with those thick grey tights they used to make you wear at school.
I'm pretty sure that's what he'll come on in when they do the 'remember them?' section in the final. 
Re Blackpool and final, maybe it's too much hassle to cart everyone and everything up there again? And it's not, oddly, a really great venue for Strictly IMO. They have to work really hard to fill the space with big props, extra dancers etc. It's OK for a one-off every series, but wouldn't feel right for a final I don't think.
On Jonnie, I watched his jive again the other day and it was SO good. He's definitely gone backwards. What's happening? 
I watched Gethin and Ian on ITT and I thought there was a hint of homophobia in it, TBH. Lots of comedy shocked faces at the idea of touching him. Otherwise, Gethin was quite good. He's hotter now than when he was on the main show I think.