Pete - many thanks. Not being clever but it did occur to me before contacting you that ATV referred to analogue but I couldn't seem to get the remote to the tuner part of the menu to alter things to digital. The TV has previously (just) been used by grandson coupled to his computer & I now realise that from new it has never been tuned in for TV!!
Wasn't quite able to find TV/DTV but the main thing is that following your reply I've now got the TV working as a TV having retuned it so many thanks indeed for your helpful response.