On Fri, 22 Nov 2019 09:02:59 +0000, alan_m wrote:

Have you considered the alternative of an electronic front door
lock
that automatically unlocks when one of the authorised mobile
phones
show up ?

Much more expensive but much easier to use.

Technophobe owner of property who sometimes has trouble using a mobile
phone (assuming that is not left on a table on charge) ...

B-)

But doesn't rule out an electronic keypad and lock.

... also forgets to take a key.

I guess removing any latch so that the door had to be physically
locked on exit (thus ensuring user had key) wouldn't work as they'd
also forget that door needs locking.

--
Cheers
Dave.