I'd be a Daily Telegraph reader (despite reading nearly everything online these days).
I have been told that The Daily Mail has a fairly good listings guide, on Saturdays presumably.
I presently receive the Radio Times by mail order, the London edition, in order that I can obtain the London channel listings. It costs £1.60 per week, as I write.
I assume that all newspapers sold in Northern Ireland have local editions; hence, The Times, Telegraph, Mail etc sell local editions in Ulster.