Also Lectrician, sorry to bother you again matey.
Since Virgin were going to bring my broadband and telephone service in at the same time I was wondering what cable and other material i would need to wire several telephone points around the building.
Also what is the difference between Slave and Master Sockets as both look the same
You best bet would be to :-
Wire double CAT5e points to every location where you think you will need a PC or phone, wire these all back to a patch panel. Get Virgin to install your socket next to the to the patch panel then use one of these kits to connect the phone to upto 4 points around the house :-
http://www.bttorj45.com/BTtoRJ45patchkitsstandard.html
So, for a data(PC) you simply plug a patch lead from the patch panel into your router or switch, for a phone point you plug one of the BT to RJ45 patch leads into whatever patch panel port you want to connect a phone to, at the other end you use the small RJ45>BT converter to convert the RJ45 outlet to BT. That way you are not tied as to which points can be used for phones or data-the whole point of a structured cabling system!