As RTÉ reports
Garda Commissioner Fachtna Murphy has said that he believes an attack by dissident republicans in Britain is a strong possibility.
Commissioner Murphy said he agreed with the assessment of the British Home Secretary and the head of MI5 in the UK that the level of threat from dissident republicans was now moderate to substantial.
He also said that while the intent has always been there, the capability within groups such as the Continuity IRA, the Real IRA and Óglaigh na hÉireann to carry out bombings has increased.
And the subsequent raising of the threat level in England, Scotland and Wales.
It’s also worth noting that in October last year PSNI deputy chief constable Judith Gillespie was quoted in an Irish Times report
When asked how many people were involved in dissident groups, Ms Gillespie said. “We’re talking in the low hundreds, but it depends what you mean by ‘involved’. “There are people who tacitly support these people; those people who turn a blind eye to what they do or don’t report what they do . . . or by lending a vehicle. But in terms of active involvement, you’re talking about low hundreds.”
Today’s RTÉ report is more specific
The gardaí believe that the dissident republican groupings comprise no more than 500 members, 150 of whom operate in small groups mainly in Dublin, Cork, Limerick and along the border.