Internet Socket

CarPark2

My house is pre-wired with Cat 5 cables, but no sockets at the end of them. I would like to fit the appropriate socket, i.e., one that takes a Cat 5 cable up into it and shows a port that an Ethernet cable can be inserted into on the outside (hard to phrase this properly - I hope it makes sense).
The rest of the room uses flat chrome sockets, so I would like to get the internet socket to match. I tried screwfix, but can only find telephone sockets which are different (aren't they)? http://www.ie.screwfix.com/lap-1-gang-master-telephone-socket-polished-chrome-43e201.html

It crossed my mind that maybe I am doing the wrong search. Is there a specific name that is used to refer to these "internet sockets" and/or can you advise where I would find a flat, brushed chrome one?

ED E

You need to determine how its wired first. Lots of sparkys will wire them as common which is fine for phones but zero use for networking. If you have 10x wall ports and 10x loose cables somewhere you're fine, if you 10x ports and only 1x cable then you're f'cked.

What you want is RJ45 faceplates (RJ11 is phone). Loads here:
http://ie.rs-online.com/web/c/connectors/network-telecom-connectors/networking-faceplates-outlets/