By Rachel Howarth

Copyright bbc

Jack said: “After my diagnosis, I went through a big health and fitness transformation [and] running became one of my core purposes.”

The keen traveller said he always found himself running 5km – wherever he was in the world.

Once the Covid lockdowns hit he started to take on even more running challenges.

By the end of October 2021 he had completed his first major race – the London Marathon.

The endurance running bug had truly bitten.

A year later, Jack took part in even more gruelling challenges like the 250km desert race in Jordan and a 650km run across the South African coast.

It was this final challenge that inspired Jack, who now lives in South Africa, to set his sights on India.

The trip is expected to cost about £70,000, funded by sponsors, a series of money-raising events and Jack’s own savings.