Of course, because I did not give you the answer you wanted I must be in some way prejudiced against people from Northern Ireland.
No Bigden that is preposterous, the reason I did not give you a step by step guide to how to carry out this work is because I have no idea of the level of your DIY skills, electricity is extremely dangerous in the wrong hands. As an example, the electric chair once used in the USA to execute murderers delivered a current in the region of ten amps, the circuit you propose to work on in my experience, considering the cable csa, carrys a little more than three times that under normal conditions.
I advised you to post your location for your "friends" job which you did, is it down to me that you got no response? That was obviously the best advice I, as a professional electrician, could give since it appears you're a DIYer because if I'd given instructions and you had hurt or killed yourself then who would your family be blaming?
My reference to you being in Belfast was in response to Phil's comment about the work being potentially notifiable as I know in Northern Ireland Part P of the building regulations does not apply.
