Check whether UK clocks go back tonight, the exact 2026 BST-to-GMT time, what happens to the repeated 1 a.m. hour, and which devices or plans to verify. Yes, if you mean Saturday night, October 24, into Sunday, October 25, 2026. BST (UTC+01:00) in London on Sunday, the clocks go back to 1:00 a.m. The change happens at 01:00 UTC on October 25.