Both Ireland and North Ireland will be represented. Close to half the show will be dedicated to some of the most interesting artists including The Boomtown Rats, Stiff Little Fingers, U2, and My Bloody Valentine.
There is an interesting Top 50 Irish Artists list available online as well as (almost) all you need to know about Indie/Alternative Irish Artists
Trivial note: I believe that 33 songs in one show is a record for The Modern World. The playlist often stays between 28 and 30 tracks over a two-hour period.