OK - so what will you say? I'm not being awkward, but it is of crucial importance because if you say one thing and then do another you will have one hell of a mess to sort out when you ask for your Completion Certificate and they say "No".
wiring up a loft is pretty straight forward i thought.
But do you only think that because of your unknown unknowns?
Then let him make all the technical decisions - he will be the one signing to say it was all properly done, so he will do what he wants anyway.
If you tell him you don't want surface wiring, he will find a way to do that and will design the circuits in a way that makes it safe to do that.
Can anyone then tell me what i need to think about in wiring up my new loft (bed room and en suite).
You need to think about what lights, switches and sockets you want where.
Then you tell your electrician and he gets on and makes it happen in ways which are legal.
the current lighting supply is laid under the current loft insulation. is this really a big consideration?
Why don't you tell us, as you think it's all so straightforward?
I'm not poking fun, but the fact that you don't know how big a consideration thermal insulation is in circuit design shows that it isn't all straightforward for you right now.
http://www.tlc-direct.co.uk/Book/4.3.1.htm
I would prefer to have it below the new floor however, so it is out of harms way.
Can anyone clarify this for me. thanks.
1) Your electrician will not install cables in harms way.
2) If you want them below the floor he will put them there, and design the circuits in a way that makes it safe.