[7] His result meant that the Unionist vote was split, and therefore, the Alliance Party candidate Sorcha Eastwood gained the seat from the DUP.

Following Steve Aiken's resignation as leader of the UUP, Butler was reported to be "giving serious consideration" around standing for the party leadership.

[9] On 24 May 2021, in addition to his existing role as party chief whip, Butler was appointed deputy leader of the UUP.

[10] In July 2023, Butler, as UUP deputy leader, ruled out any electoral pact with the Democratic Unionist Party (DUP) for the 2024 United Kingdom general election.

"[12] Butler accused the Department of Health of forcing community and voluntary organisations towards a "financial cliff edge" on 23 August 2023.