In the end, got my done about a month ago. Went up to London, handed my document in, they processed it, and got it within a week. Not sure if it was quicker than it would have been doing it the usual way, but they guarantee it will be quick.
Good luck everyone who is renewing it/applying soon!
Has anyone recently renewed their passport? If so, how long did it take to get back?
They aren't taking express applications at the moment, which is annoying as I am only in the UK for 4 weeks.
Thanks!