Yorkshire golf: Hornsea GC duo Joe Palmer and Leigh Gawley to play 150 holes in a day for cardiac screening charity CRY

So this year the pair have decided to push themselves even further and play 150 holes to raise funds for CRY, a charity which works to reduce the frequency of young sudden cardiac death.

Palmer and Gawley will undertake the marathon, eight and one third rounds, in memory of Hornsea schoolboy Josh Fell, who collapsed and died in 2011 from a previously undiagnosed heart condition.

"Josh's father, Richard, has campaigned tirelessly for the last five years to help provide heart screening for the young and has helped raise over £100,000," said 34-year-old Palmer.

"The men's and ladies' captains here at Hornsea GC had already chosen this as their charity this year, so Leigh and I thought we would piggyback on the back of that as it is a wonderful cause."

Last year, along with a third member, Chris Wilson - who opted in to the event to mark his 50th birthday - they raised over £3,000 for Dove House Hospice and Barnardo's.

A party involving family and friends was to descend on the Hornsea clubhouse at 7.30pm to greet them at the end of their golfing marathon and, realising they were making good time, the trio stopped for an hour.

This year there will be no time for such 'slacking', for - even if Friday, June 24 turns out to be a good day weather-wise - they will have a playing window of approximately 17 hours by starting at 4am.

To play 150 holes will equate to just under seven minutes per hole - a particularly tough ask when it will involve walking somewhere around 45 miles.

"We think this will be the ultimate challenge given the number of daylight hours available to us," said 10-handicapper Palmer. "Last year we started at 4am and finished about seven, but we were kind of ambling round and we had an hour' s break in the middle when we realised we were making good time.

"I had really badly blistered feet, but we were pumped up on adrenaline. We used a pedometer last year and it recorded 29.9 miles, so we are thinking it will be about 45 miles this year."

Forty-three-year-old Gawley, the East Riding match play champion, plays off two and last year broke 80 for each of the five completed rounds.

"Leigh is robotic, he never strays off the fairway," said Palmer. "Leigh likes a challenge to keep himself going on and he wants to see if he can break 80 with just a five-iron during one of the rounds."

To lighten the load, the duo carried only half a dozen or so clubs with them - rather than the maximum permissible 14 - and Hornsea clubmates carried their bags during the day to assist them further.

"We had people caddying for us and walking around and taking photographs of us and chatting to us," recalled Palmer. "It was great. They really kept us going.

"We had helium-filled balloons tied to the golf bags so other people playing ahead could see us coming and they just stepped out of our way to let us through."

The pair have a Just Giving website, to enable people to make donations ahead of the day, and will also look to raise further funds during the event, as they did last year.

"We raised an awful lot on the day itself by having buckets by the tee markers and in the bar, and we had a raffle, which we might be having again this year," said Palmer.

Their Twitter address is @hornsea150, and anyone wanting further information about CRY can go to their website www.c-r-y.org.uk/.