A physiotherapist from Royal Surrey County Hospital is set for an underground mission.
On April 8 the intrepid adventurer is planning to visit all 270 stations in as short a time as possible.
The Guinness Book of Records credits D.R. Longley and R.J. Lewis with completing the first Tube Challenge on June 13, 1959.
The fastest time to travel to all London Underground network stations is 15 hr 45 min 38 sec, and was achieved by Andy James and Steve Wilson May 21, 2015.
Andy and Steve are veterans of this record – they were joint record holders in 2011 and 2009, and Andy was twice a joint record holder in 2008.
Mr Griffin-Mead and his friends are not expecting to be on record breaking pace and hope to complete the unique endurance test in around 18 hours.
Their challenge will start at 05:45 at Kensington Olympia and they hope to arrive all the way out at Amersham/Chesham at around midnight.
All travel must be via public transport, so they are not allowed to hail a taxi or have a car waiting to help them.
Mr Griffin-Mead said: “As a specialist Physiotherapist working in cancer care, I have chosen to raise funds for St Luke’s Cancer Centre as I see the fantastic work that goes on day after day by a team of highly skilled, dedicated and passionate people.
“But, the greatest motivation is trying to improve the experience of thousands of patients that are treated each year at St Luke’s Cancer Centre at Royal Surrey.
“Patients, their relatives, friends and carers make huge sacrifices to undergo treatment for cancer, and improving facilities help us to continue to provide the best possible care.
“This includes both clinical facilities that improve the way in which we are able to deliver care, as well as helping to make the environment somewhere that is more comfortable, less daunting to be in.”
To sponsor Mr Griffin-Mead, please visit http://uk.virginmoneygiving.com/davidgriffinmead.