Volcanoes in the UK: Extinct Peaks, No Active Threats

The UK has no active volcanoes. However, several extinct or dormant volcanic mountains remain:

• England (Cumbria): Scafell Pike (highest), Blencathra, Cross Fell.
• Wales (Gwynedd/Powys): Snowdon (highest), Cadair Idris, Pen y Fan.

These formed during the Paleozoic and Mesozoic eras. They retain volcanic shapes but pose no eruption risk.