http://www.ebay.co.uk/itm/Remote-Contro ... 5d53a2296a" onclick="window.open(this.href);return false; - except you only get ONE socket in that kit at £10.99

Point I'm making (and possibly something Ghost123UK may want to play with) is that stripped down, that gives you a lot of remote controlled circuitry for next to nothing. The recievers are no doubt stepped down to 12v or 5v (probably 12v to energise the relays) so should work off a car battery too. £6 for two 4-channel remotes and four recievers is good value.
As units, they operate on 433MHZ and each one will switch up to 2KW
All this for £5.98

