Just had a look at my old TV and it does not give you an option unless maybe you have to reset the TV. Now not sure whether that is the way to go.
Like yours mine says Uk for television etc but I am sure when I first set it up I chose England then it gave area in England which you either had to choose or pick the recommended one. It probably does it automatically now on new TV's
It also gives you the opportunity of picking what you want to use. HDMI. Cable etc. Not sure what yours is set to but worth checking.
You should also be able to see the signal strength for all channels.
Without resetting my TV I cannot give you any further suggestions as I would only be guessing.