When I had the oxygen system installed in my flat the Fire Brigade had to come and check everything was okay, things like double sockets are band, the block ones but the plug in trailing sockets are okay. Mind you girls you don't always get your own way in things like this I got a fireman and a firelady
They also put me a new smoke alarm in a 10 year one with no batteries, ou jst have to test it each week and use the suction hose on it every week. They spent around an hour and inspected all my appliances, and gave me a good talk on fire safty, to me a very worthwhile exercise