A Suffolk runner will begin a week-long mammoth challenge on March 13, running from Wales to Lowestoft.
Tom Boother from Martlesham will set off at 7 am from St David's Head, the most westerly point of Wales, and start his 563km journey.
He aims to finish at Lowestoft Ness, the most easterly point of the UK on Sunday, March 19, evening.
Mr Boother said: "It's been a while since I took on a challenge of this magnitude.
"I have trained hard and feel ready."
In 2016, Mr Boother took on the John O'Groats to Land's End challenge.
During this challenge, he will have support from family members, with his cousing Damian, parents Richard and Debbie and girlfriend Sarah supporting him along the way.
He also has backups from friends Graham and Caspar, for which he is "really grateful."
He will be raising money through this challenge for Home-Start in Suffolk, saying: "Ever since I started training, I have been asked if I am raising money for charity.
"Most of the time I do it for the challenge, but for this I have chosen to support Home-Start in Suffolk, a charity that does so much for so many families across our county.
"Bringing up kids is like running, many ups and downs with a few good surprises along the way, but sometimes you need a little extra help and support, and Home-Start volunteers make a real difference."
Fundraising and marketing manager for Home-Start in Suffolk, Ali Watson, said: "We are so grateful to Tom for choosing to support us with this inspirational challenge.
"We fully understand the effort and training he has had to undertake to be ready for this run and we couldn't be prouder."
Mr Boother continued: "I hope my journey inspires others to take on new challenges."
To support Tom on his journey, click here.
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