I had wondered about a push-to-release catch (e.g. Tutch Latch) -
http://www.sdslondon.co.uk/product/6...tch_latch.html - but
I've just found them in Homebase and they are very sensitive to
release, I'm sure that they would keep letting go when being cleaned.

Has anyone had any experience with magentic release childproof latches
- http://www.sdslondon.co.uk/product/6...ety_catch.html
- as, provided I can get the magnet close enough to the back of the
tile, it seems like an ideal solution?