Power cycled the routed
Various - sometimes no connection, sometimes the menu dies. If it get to the point where I can enter a password, then the system continually pops up yellow window telling me that the service I want is not available due to a technical error, try later
Got at the reset screen through the menu - holding exit did not work. TV resets and reboots - click through to the network screen. TV sees the wireless network - enter password ***** connection fails. Try again - does not see the network. Much as before.
I don't know how much a repair will cost but I can't see it being much less than £200 if you throw in the time and hassle. I can get a new model for £449 - I'm inclined to throw the money at that and sell the old one. I like the TV dispite this problem - it does exactly what I want and at £449 its a good deal