I have a netgear powerline 1000 for sale ,boxed and unused.. It plugs into your router then uses the building cabling to carry the signal to the other unit.. This is not wireless but will transmit faster than wireless and more stable, £28 posted..
Are you coming to techenders Art? Fed up with my Wi-fi not working round corners, and the BT Wi-fi extender is worse than useless. Time to try something that uses the electric ring circuit