A cancer-stricken young father says he refuses to "roll over and die" and has launched an urgent appeal for help - despite doctors telling him he may have just weeks to live.

Jon Strawson, aged 33, who has three children under the age of seven, said he owes it to his family to continue fighting.

Jon, who lives near Crediton in Devon, was diagnosed with acute myeloid lymphoma (AML) on July 21 last year - his 33rd birthday.

Since then, he has undergone a string of unsuccessful treatments, including a stem cell transplant - and is now battling through a last-resort course of chemotherapy so intensive, that even if he survives he might never recover from the side effects.

He released a heartbreaking picture of him following his first bout of treatment, cuddled up to one of his young sons.

If it does not work, doctors have said he may only have a few weeks to live.But Jon said he refuses to give up, and is determined to fight on for the sake of his family - seven-year-old Freya, six-year-old George, four-year-old Henry and his wife Rachel.

"I have three young children so this prognosis is unacceptable," he said.

"I am not ready to just roll over and die. I owe it to my children and my family to exhaust every avenue."

He said:

He has appealed for anybody with any suggestions of physical, mental, medical or holistic care, as well as information about any new drug treatments - especially those aimed at relapsed AML patients - to contact him via e-mail on: ray.jon@hotmail.com