I think that was a bloody good answer!

I chose 3 to begin with but 2 of them I couldnt do because of gcse grades, so I am left with 1 choice, so hopefully it will all work out.

btw - in the interview, do they have the original application that they work from or do the army office inform them of ...

Definately the Royal Engineers if your looking to become a sparky on civvy street - you will do most of what a civvy street sparky does as opposed to signals electrician.