There is a DIY section, perhaps something like this should be in there. Then as an 'competent electrician', if you don't feel inclined, you wouldn't venture into that section.
I do take Westwards point. 'Part P' was introduced making it 'a legal requirement for all work on fixed electrical installations in dwellings and associated buildings to comply with relevant standards (IET).
Without training, knowledge, expertise and appropriate equipment, I can't see how anyone can comply with these standards.
Not wishing to have a go at our OP, but asking such a simple question, brings into question his abilities to safely carry out such work. There's a fine line between what constitutes helping people, to putting them jeopardy. A little knowledge is a dangerous thing.
Just my opinion.