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Thanks both.
I think I'll order your second suggestion hc4361 as the first would appear to either allow signal to the sky box or TV ie one device at a time.
Prudie, I do have wireless at home but having looked on the LG (TV manufacturers) forum, the advice given about connecting wirelessly involves plugging a wireless dongle into the TV and then setting up the connection on screen from there.. I don't have such a device as it wasn't provided with the TV or router. I'm really not sure if I can make a wireless connection without such a dongle.