What Did MI5 Know About Omagh?

In the latest twist involving the world of intelligence agencies, RTE (amidst other agencies) are leading with a story that MI5 withheld vital information about a bomb plot from the Special Branch in the period leading up to the Omagh bomb. Cue the latest bout of Durkan-speak (No. 134): ‘Allowing MI5 to have a lead role in intelligence in Northern Ireland would be like appointing Herod as children’s commissioner.’