Hi All,
When I first moved into our building the meter and switch rooms did not have locks. There was some measure of tampering with lighting on Common Property etc by residents and also dumping of rubbish in these rooms which is a fire hazard. I organised for locks to be installed. The locks have a key called an NMB key which is standard to all electricians, firemen and some other tradespeople. This means that any qualified electrician, meter reader or emergency service always has access.
Cheers
CBF