It would be interesting to hear from people whose application was submitted at other embassies apart from London.
London seems to turn applications round in 6 months or less, here in Switzerland my docs were received on 11th August but no result yet.
Good luck to everyone who has applied.
@joanward A bit of advice, make sure your witness is someone who is easily contactable and likely to reply promptly, my doctor was contacted to ask if I really had signed the form in front of him (so do that properly), from his account I think he couldn't be reached and took a while to reply to them...