Relatives of the Omagh bomb victims are to meet Irish Justice Minister Alan Shatter tomorrow to press home demands for a cross-border inquiry into the 1998 atrocity.

Dentist Colin Howell and his ex-lover Hazel Stewart got away with murder for almost 20 years because of a deeply flawed police investigation which also failed the families of their two victims, a report claimed today.

The Northern Ireland Police Ombudsman’s Office was releasing today what is said to be a “damning” report into the Royal Ulster Constabulary investigation of a murder by loyalist paramilitaries six years ago.