I am now down one tie and one shoelace, but on the plus side the house is no longer 'haunted'.
The cause of all the funny little noises and things going wrong was... well, I don't quite know what to call him. Picture a sort of blue monkey with scales and six legs. Wearing my tie, I should add. And currently lurking somewhere in our solarium.
A bit of research on the internet told us there was some sort of UFO sighting about five years ago, and a bit of snooping in the garden told us a ship had crashed, with our monkey-like friend the rough equivalent of the ship's cat. If there were any survivors of the crash, they've long since legged it, but Mr Monkey remained, causing the usual sorts of havoc alien pets do.
And eating cockroaches, for which Prof Blackburn should probably be glad.
Anyway, we're now left to decide what to do with him. He's some sort of pet, so in theory he should be house-trainable, but I like that tie!
(Oh, and just a reminder that if anyone has a case of their own they want us to solve, they should go
here. And I should probably say at this point we're having to charge for our services because it seems that's what businesses do and we have a mortgage to pay. We are prepared to negotiate, though, since nobody should have to have alien trouble just because we set our price tag too high!)