If you are in London
you can do it in a day, even for a stolen one, I think. Unless the rules have changed drastically in the last couple of years. It will take all day though, you have to go to the London office in St James' for interview.
( the mighty badger Aphrodite, on a bar stool, by your side, Fri 15 Oct 2010, 15:46, 2 replies, latest was 15 years ago)

This is correct. Lot of queueing involved, though.

( Monty Boyce, My cheese game is strong, Fri 15 Oct 2010, 16:02, Reply)

It's a week - the gf has checked.

(lkjshaglkasjdhglkhjz lkcvl; g;aodh;owih, Fri 15 Oct 2010, 16:51, Reply)

yeah, it does seem to say that.
I have actually done it though, and in fact done it for someone else's passport (the ex-wifes after the cleaner nicked it) so it might be worth actually calling the passport office in St James direct to double-check? (unless that's what your doris has already done of course)
( the mighty badger Aphrodite, on a bar stool, by your side, Fri 15 Oct 2010, 17:05, Reply)

It will be closed by now but I will give them a call on Monday

(lkjshaglkasjdhglkhjz lkcvl; g;aodh;owih, Fri 15 Oct 2010, 17:18, Reply)