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Reform UK Welsh leader resigns after arrest on suspicion of assault

Dan Thomas steps down from his leadership role while maintaining he did nothing wrong

Updated Sep 15, 2026 · 20:55 UTC2 reports

The short version

Dan Thomas has resigned as the leader of Reform UK in Wales following his arrest on suspicion of assault and controlling or coercive behaviour.[BBC News]
Police confirmed a 45-year-old man was arrested on September 13 and released on bail pending further inquiries.[The Guardian]
Thomas stated that he was released without charge and maintained that he has done nothing wrong.[The Guardian]
On the same day as the resignation announcement, Reform Member of the Senedd Sarah Cooper-Lesadd defected to Plaid Cymru.[BBC News]

Dan Thomas resigned as Reform UK's leader in Wales following his arrest on suspicion of assault and controlling or coercive behaviour.[BBC News · The Guardian]
Gwent Police confirmed a 45-year-old man from Aberbargoed was arrested on September 13 and bailed pending further inquiries.[BBC News · The Guardian]
Dan Thomas stated he was released without charge and maintains he did nothing wrong.[BBC News · The Guardian]
Reform MS Sarah Cooper-Lesadd defected to Plaid Cymru on the same day.[BBC News · The Guardian]

The outcome of the police investigation remains pending as police inquiries continue following Dan Thomas's release on bail.[BBC News · The Guardian]

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.