I'm doing the Big Golf Race marathon twice this summer - once as part of the Prostate Cancer UK staff team on 30th June, and the other with a close friend on 5th July. Both times I'll be playing four rounds of golf in one day and walking over the distance of a marathon each time.

Prostate Cancer is now the most commonly diagnosed cancer in the UK, killing one man every 45 minutes in the UK. That's the same time it takes to play three holes of golf. That's why I'm golfing the distance and taking on The Big Golf Race (twice), to keep men in the game for longer. 

The money raised by this challenge will help fund research into life-saving treatments for prostate cancer and provide practical support to men and their families.

Guess my total score across 8 rounds: I'll be handing out a prize to whoever has the closest prediction of my total number of shots across all 8 rounds. Leave your guesses in your donation comments