There are a LOT of misconceptions about electrical work. Like who can legally do what and do I have to employ an Electrician.
Trust me when I say even electricians argue this point!
Sometimes (believe it or not) down to lack of knowledge and sometimes becuse they insist that only “qualified” people can do any electrical work. They say this because they do not want to loose business. 
I get it but alas, for them at least this is not correct.
So what can I do.?…. Although I do know my way around most things electrical, both domestic and industrial (my past employment history has given me this knowledge)  I am not certified to do certain types of work.
This is both dangerous and illegal. So even if you do not use my services you must check what other people claim they are allowed to do.
That said, as a rule of thumb, and to simplify it for you the customer I am permitted to change/replace/repair certain things around your home. Such as (but not limited to) light switches, sockets, lights, bulbs, tubes, plugs, fuses etc.

As long as the job isn’t within a ‘special location’ such as a bathroom or outdoors, you’re also allowed to install additional new light fittings, switches, sockets and even add a single fused spur to an existing circuit (a ‘spur’ is a new cable and socket run as a branch from an existing socket on the ring main).

And in actual fact – A ‘non-qualified’ person can still carry out notifiable electrical work as long as Building Control are informed

As a basic guide and rule of thumb – If it is in place I can replace or repair.

Rest assured, I do not want to do anything that is illegal or worse yet dangerous and i will not put you or me in that position.

And yes the image above is one of my jobs.
This was a very large chandelier 🙂

If in doubt just ask.
But chances are for all your basic electrical requirements I can help and usually cheaper than an electrician.