In message , Paul Ekins
writes
I would like to know what happens when theres a power cut....


One would expect some sort of battery back up would be required.


Well, presumably there would be a manual locking/unlocking system as
well anyway.

ISTR that those 2 designers on that TV program about redesigning common
objects came up with one of these. sounds like a good idea, I suspect
the cost implications are the problem
--
Chris French, Leeds