Alfie and Joe Pritchard worked with Dr Matt Cook at Worcester University ahead of the challenge
Classic and vintage car owners are driving from the Caithness village to the French Riviera.
The Bootneck Yomp challenge has raised for thousands of pounds for charities.
Classic and vintage car owners will drive from the Caithness village to the French Riviera next year.
The group pulling a one tonne field gun from John O'Groats arrives at Land's End.
Drew Jonkmans reaches the halfway point of a running and cycling challenge to raise support for mental health.
Drew Jonkmans is running from Cornwall to Scotland and then cycling the same route back.
Ella Shepherd will join the Tour de 4 in Glasgow as part of her Land's End to John O'Groats ride.
Chris Stanbury's 2,500-mile journey raised more than £20,000 for a children's charity.
