My Philips L.C.D T.V has suddenly started changing channel, volume and other settings of its own accord. Have checked remote control- all seems to be in order there. Television is only just over one year old and has worked perfectly up to now. Any advice gratefully received.

How did you determine the remote is OK? I would remove batteries or from the room to verify. If the buttons are on top of the TV, something may have spilt inside.
A Tuner cleaner may help, get one that says safe on plastics and leaves no residu.

Thank you, Stratmando, for your advice re: Philips T.V. I will try the Tuner cleaner you suggested.