In honour of this year's London Film Festival (and on the day of its Surprise Film) we wanted to give you the biggest surprise we could. So surprise! Here's a quiz about toilets.

Yes, toilets. The stop-gap, start point and end point of many a film. Especially if you've just forced your bladder to restrain itself through the whole of Carlos. But after a fortnight of LFF-ing, how well do you know your London cinemas? Do you have a capital knowledge of the underbelly of the city's most thriving film venues? Where do you flush away your popcorn?

It's simple: we've picked six top LFF washrooms. See the bog, name the building*. The BFI LFF Official Toilet Quiz! And no, American Express would never affiliate themselves with this kind of crap.

* Answers are displayed in magical writing beneath each picture.

"And sometimes when the night is slow, the wretched and the meek, we gather up our hearts and go a thousand kisses deep."

There's nothing like a bit of Leonard Cohen to put you in the mood for some doomed romance. But Dana Lustig's drama is a bit more than that. Following the attempts of Mia (Jodie Whittaker) to untangle her relationship with Ludwig (Dougray Scott) from her troubled past, A Thousand Kisses Deep plays like a cross between psychoanalysis and Dr Who. With Dougray Scott playing the trumpet. And David Warner playing Dr Who.