Key Points
- Former Barnet Council leader Dan Thomas has resigned as leader of Reform UK in Wales following an arrest over the weekend.
- Thomas was arrested on Sunday, 13 September, on suspicion of assault and engaging in controlling or coercive behaviour, before being released on bail pending further enquiries.
- In an official statement, Thomas maintained his innocence, stating he has “done nothing wrong” and stepped aside to prevent headlines from becoming a distraction to his party’s parliamentary work.
- Gwent Police confirmed that a 45-year-old man from the Aberbargoed area was arrested and subsequently bailed.
- The politician previously led Barnet London Borough Council from 2019 to 2022 as a Conservative before defecting to Reform UK in June 2025 and moving to Wales.
Aberbargoed (North London News) September 16, 2026 — Former Barnet Council leader Dan Thomas has officially stepped down from his position as leader of Reform UK in Wales after being arrested by police over the weekend on suspicion of assault and coercive control.
As reported by local media outlets covering the Welsh Senedd and London local government developments, Thomas confirmed his departure from the leadership role following a police intervention on Sunday, 13 September. In a statement issued through the party, Thomas outlined his reasons for stepping down, emphasizing that he wished to shield his party colleagues from public distraction while maintaining his complete innocence regarding the allegations made against him.
In the statement released by Reform UK, Dan Thomas stated:
“Over the weekend, I was reported to the police and was released without charge.”
Thomas further stated:
“I stress that I have done nothing wrong, but I do not want the coming headlines to be a distraction from the fantastic work our Senedd team is doing in holding this government to account.”
What Have Gwent Police Said Regarding the Investigation?
Law enforcement authorities confirmed that an investigation into the allegations remains ongoing following the initial arrest.
In an official statement released regarding the incident, a spokesperson for Gwent Police stated:
“On Sunday 13th September a 45-year-old man, from the Aberbargoed area, was arrested on suspicion of assault and engaging in controlling/coercive behaviour. He has been bailed pending further enquiries.”
The police statement clarifies that while Thomas noted he was “released without charge” in his immediate comments, he remains subject to conditional bail as police continue their enquiries into the report.
What Is the Background to Dan Thomas’s Political Career?
Dan Thomas has maintained a long-standing profile in UK local and regional politics, predominantly within North London prior to his recent transition to Welsh politics.
Thomas served as the leader of Barnet London Borough Council between May 2019 and May 2022, representing the Conservative Party. During his tenure in North London, he oversaw council policy, planning applications, and borough administration until the local elections in May 2022.
In June 2025, Thomas announced his defection from the Conservative Party to Reform UK. Following his switch, he formally stepped down from his position as a Barnet borough councillor in December 2025, citing a desire to relocate and spend more time in Wales.
Upon moving to Wales, Thomas’s rise within Reform UK was swift. In February 2026, he was appointed as the party’s leader in Wales. He subsequently spearheaded Reform UK’s election campaign during the Senedd elections, securing second place in the assembly and assuming the role of leader of the opposition in the Welsh Parliament prior to his resignation.
What Are the Future Projections for Reform UK and the Senedd Opposition?
The abrupt resignation of Dan Thomas leaves Reform UK facing an unexpected leadership transition within the Welsh Senedd, directly impacting the party’s elected representatives and its core voter base across Wales.
Having established itself as the secondary political force and official opposition in the Senedd following recent election gains, the party must now select a replacement leader to maintain its parliamentary challenges against the Welsh Government. The key areas of impact for the party and the electorate include:
- Parliamentary Continuity: The primary impact on Senedd members and party supporters will be the immediate need to establish interim leadership to ensure legislative oversight and scrutiny continue uninterrupted during parliamentary debates.
- Political Scrutiny: Opposing political parties in the Senedd are likely to leverage the leadership instability and the circumstances surrounding Thomas’s departure to challenge Reform UK’s political momentum and organizational stability in Wales.
- Impact on the Electorate: For Welsh voters who backed Reform UK during the recent election, the departure of the group’s lead figure introduces uncertainty regarding the party’s long-term policy direction and central spokesperson in the Welsh Assembly.
