In reply to M Lyons:
Have climbed a lot at Ballygalley but not for almost fifty years, so beta may not be quite up to date! The odd route was V Diff but would think the place will be covered with grass (might be wrong, though) and I think climbing is discouraged. It's (very) near the road and I heard a local golf club objected.
If I were you I'd grab the latest Mournes guidebook (in general, a superb publication) and head to Hen mountain, near the Spelga Pass. Bit of a drive (two hours?) and a twenty minute walk. But, on a good day, it would be fantastic. Very rounded holds, friction climbing (takes a bit of getting used to; bring those cams!) A great position and a feeling of being in the mountains, even if you're really just above the road.
There may well be other (better?) alternatives, these days. But a vote for humble - yet lovely - Hen! I've got great memories of the place.
Mick