A man who is gradually going blind is to stand on the top wing of a biplane travelling at 135mph, 500ft in the air, to raise money for a disability charity.

Mark Baxter, 35, from Crayford, will be undertaking the daredevil challenge for Sense, which supports people who are deaf, blind, have sensory impairments, or other complex needs.

He has a degenerative condition called retinitis pigmentosa (RP) and has been losing his eyesight from an early age, but has used the disability as a spur to do as much as he can before he completely loses his sight.

In the last decade he has undertaken a number of extreme challenges, including skydives, the London Marathon, the Three Peaks Challenge, and treks across the Sahara Desert and Iceland.

Mark will take to the skies on a Boeing Stearman biplane on Saturday as part of Deafblind Awareness Week, and is hoping to raise £1,000.

Donate at justgiving.com/senseflight1717.