Colin Wallace's claims At the time of the bombings,
Colin Wallace was a British Intelligence Corps officer at the British Army's Northern Ireland headquarters. Since his resignation in 1975, he has exposed scandals involving the security forces, including state collusion with loyalists. He gave evidence to the Barron Inquiry. In an August 1975 letter to Tony Stoughton, chief of the British Army Information Service in Northern Ireland, Wallace writes:There is good evidence the Dublin bombings in May last year were a reprisal for the Irish government's role in bringing about the [power sharing] Executive. According to one of Craig's people [Craig Smellie, the top MI6 officer in Northern Ireland], some of those involved – the Youngs, the Jacksons, Mulholland, Hanna,
Kerr and McConnell – were working closely with [Special Branch] and [Military Intelligence] at that time. Craig's people believe the sectarian assassinations were designed to destroy Rees's attempts to negotiate a ceasefire, and the targets were identified for both sides by [Intelligence/Special Branch]. They also believe some very senior RUC officers were involved with this group. In short, it would appear that loyalist paramilitaries and [Intelligence/Special Branch] members have formed some sort of pseudo gangs in an attempt to fight a war of attrition by getting paramilitaries on both sides to kill each other and, at the same time prevent any future political initiative such as Sunningdale. In his evidence to the Barron Inquiry, Wallace argued that the security forces had so thoroughly infiltrated the UVF that they would have known such a huge bombing operation was being planned and who was involved. He then noted that the bombing investigation team was disbanded a very short time after the bombings. Barron noted that Wallace's August 1975 letter was "strong evidence that the security forces in Northern Ireland had intelligence information which was not shared with the Garda investigation team." As with Fred Holroyd and John Weir, there were unsuccessful attempts to undermine Colin Wallace. Barron noted that Wallace was targeted by the same security services he had served. He was forced to resign in 1975, ostensibly for trying to pass a classified document to journalist
Robert Fisk. Wallace claims the real reasons for his dismissal were his refusal to continue working on the
Clockwork Orange project, and his discovery that the security forces were involved in
a child sex abuse ring. After his dismissal, Wallace attempted to expose these scandals, as well as state collusion with loyalists. In 1980, shortly after making some of his allegations, he was arrested and convicted of manslaughter. He was released on parole in 1985 and proclaimed his innocence. Various people have alleged that Wallace was
framed. He later had his conviction overturned and was paid £30,000 compensation for unjust dismissal from government service. His role within the British Army intelligence service had been officially, albeit belatedly, acknowledged in 1990.
John Weir's claims John Weir was an officer in the RUC's
Special Patrol Group during the 1970s. In 1980, he and fellow RUC officer
Billy McCaughey were convicted of taking part in the murder of a Catholic civilian. Following their convictions, they implicated fellow RUC officers and UDR soldiers in a string of loyalist attacks. In a sworn
affidavit, Weir revealed that he had been part of the 'Glenanne gang' – a secret alliance of UVF members and security force personnel who carried out numerous attacks on the Irish Catholic and Irish nationalist community in the 1970s. Most of its attacks took place in the area of
County Armagh and
Tyrone referred to as the "murder triangle", but it also launched some attacks in the Republic. According to Weir, this included the Dublin-Monaghan bombings. He named people who he said were involved in a number of these attacks. He also named a farm in Glenanne, owned by RUC officer
James Mitchell, which he claimed was used as a base of operations by the group. Furthermore, he alleged that senior RUC officers knew of, and gave tacit approval to, these activities. According to Weir, the main organiser of the Dublin-Monaghan bombings was Billy Hanna. He claimed that Hanna, Robin Jackson,
Davy Payne and William Marchant carried out the Dublin bombings, while Stewart Young and brothers John and
Wesley Somerville (both UDR soldiers) carried out the Monaghan bombing. He claimed the explosives had been provided by Captain John Irwin, a UDR Intelligence Officer, and that the bombs had been assembled at the Glenanne farm of James Mitchell, with help from fellow RUC officer Laurence McClure. The Barron Inquiry believes that Weir's evidence is credible, and "agrees with the view of An Garda Síochána that Weir's allegations regarding the Dublin and Monaghan bombings must be treated with the utmost seriousness". The Barron Inquiry found evidence to support Weir's claims. This included a chain of
ballistics history linking the same weapons to many of the attacks Weir outlined. Journalist Susan McKay noted that "The same individuals turn up again and again, but the links weren't noted. Some of the perpetrators weren't prosecuted despite evidence against them". He claimed that the main organiser of the bombings, Hanna, had contact with an intelligence officer who reported to Holroyd. Holroyd also claimed that elements of the Irish security forces secretly agreed to 'freeze' border areas for British forces. This meant Irish forces would leave an area for a given amount of time, primarily so that British forces could cross the border to kidnap IRA members. Holroyd claimed the Assistant Garda Commissioner, Edmund Garvey, met him and an RUC officer at Garda headquarters in 1975. Holroyd named Garvey and another Garda (codenamed 'the badger') as being on the "British side". Garvey later denied that the meeting took place. However, Barron found: "The visit by Holroyd to Garda Headquarters unquestionably did take place, notwithstanding former Commissioner Garvey's inability to recall it". Garvey was dismissed by the incoming
Fianna Fáil Government in 1978, who simply stated it no longer had confidence in him as Garda Commissioner. The Barron Inquiry found that members of the Gardaí and RUC attempted to unfairly and unjustly undermine Holroyd's evidence. It says that "Some of the RUC officers interviewed by the Inquiry, in their apparent eagerness to deny Holroyd any credibility whatsoever, themselves made inaccurate and misleading statements which have unfortunately tarnished their own credibility".
David Ervine's claims David Ervine, a member of the UVF sentenced to 11 years for possession of explosives in November 1974, dismissed allegations of collusion in the Dublin and Monaghan bombings as "sheer unadulterated nonsense", saying, "there comes a point when the concept insults me, insomuch as that a
Provo could lie in bed and with a crystal ball... could pick their targets but a Prod could only do the same if there was an
SAS man driving the car". Ervine cited his own arrest, and the number of UVF members in prison at the time, as evidence that widespread collusion did not exist:"The Royal Ulster Constabulary arrested me on possession of explosives; now why did they do that if we lived in a process of collusion? When I went into jail there were 240 UVF men in three compounds, packed in like sardines, and the UVF were a relatively small organisation in comparison to some of the others, but they made up a hell of a percentage of that jail. Where’s collusion there?" In October 2025, the
Belfast Telegraph reported that Operation Denton had established that the UVF bombing team met at the Rumford Street Loyalist Club near the
Shankill Road the day before the attacks for a final briefing from their "commanding officer", who was a 34-year-old Royal Artillery Regiment veteran named Tommy West. Other members of the gang named in the report were: • 26-year-old UVF member
William Marchant (assassinated by the IRA in 1987) • 35-year-old ex-loyalist internee Stanley Grey • 36-year-old UVF member Eddie Brown, who worked as a doorman at the Rumford Street Loyalist Club • 34-year-old William Mitchell, who was in charge of the Carrickfergus UVF at that time ==In popular culture==