Barnsley Central MP Dan Jarvis will run the London Marathon on Sunday to raise funds for Cancer Research UK in memory of his late wife.
Mr Jarvis will pound the streets of London with his dad, Bernard, who has run 68 marathons.
Mr Jarvis’ wife died of bowel cancer in 2010. He is a strong supporter of Cancer Research UK and champions its work to diagnose the disease earlier.
He said: “I am proud to be running the marathon for such an excellent cause.
“I haven’t got in as much training as I would have liked but I’m looking forward to running with my dad and soaking up the fantastic atmosphere.
“I want to thank everyone who has sponsored me so far, particularly my constituents. I know that their support will really keep me going and help raise vital funds for the charity’s life-saving work.”
He added: “Cancer Research UK is doing a range of pioneering research across Yorkshire and the Humber to help find more cancer cures, particularly at centres in Leeds and Sheffield.
“In Barnsley, survival rates have increased significantly since the mid-1990s and we now have some of the best bowel cancer screening attendance rates in the country.
“But there is still more to do. Unfortunately, more than a quarter of cancer cases in our town are still being diagnosed through emergency routes rather than by a GP. I know we could save thousands of lives if people were more aware of cancer symptoms.”