From the BBC:
As Northern Ireland sees an upsurge in dissident republican attacks, here are some of the most serious incidents to take place since March 2009.
Includes a small map, photos; alas without a link to previous reports for more details:http://www.bbc.co.uk/news/uk-northern-ireland-10866072

A recent arrest operation explained, with two charged over possession of a 0.22 cal. rifle:http://www.bbc.co.uk/news/uk-northern-ireland-14421746