Ross Jenkin heads uphill during his Ramsay Round

Ross Jenkin is on track to complete his continuous circuit of the UK’s four big mountain challenges.

The Cumbrian police officer has run three of the four 24-hour challenges and has just begun his Bob Graham Round from Keswick.

He has already completed the Paddy Buckley Round in north Wales, the Denis Rankin Round in Northern Ireland, and the Ramsay Round in Scotland.

He began his attempt at 5am on Sunday and is aiming to run each round as close to the traditional 24-hour timing for each. He is only resting on the journeys between each start point.

The challenge involves 152 summits, 387km of running and 31,800m of ascent.

His support team said he is ‘still motivated and positive, but tired as you would imagine’.

The runner is using his Big 4 at 40 challenge to raise money for mental-health charity Calm, the Dogs Trust and mountain rescue.

His progress can be followed on the Open Tracking website.