I say "as far as we can tell" because it's entirely possible that the keys are lost/buried under the skipload of junk that the seller and tenants have kindly left us. Books, clothes, furniture, bottles of vodka, a broken bong... basically all the cupboards are still full of crap. Ugh.
So, as twittered, we're going to be there on Sunday afternoon clearing stuff out. It's not exactly a party, but if anybody's at a loose end and feels like helping us sort things into piles ("recycling", "bin", "what the holy fvck is this" etc) then they will be very welcome & we will reward them with beer and/or cake (or equivalent local currency). Also, you'll be welcome to take any of the junk if you want! (I'm not promising some kind of treasure-trove here, but, y'know, books is books.)
If you're planning to take up this generous offer :-) please email/txt one of us for the address.