Andy Hampton – his baby Henley and wife Gemma. (Brain Tumour Research via SWNS) By Lauren Beavis via SWNS A dad is defying the odds after surgery for a tumor which made him convinced his loyal wife was having an affair. Father-of-four, Andy Hampton, 54, became distant and apathetic, and paranoid his wife of three years, Gemma, 37, was cheating on him.

And after the birth of son Henley, the once-doting dad showed an uncharacteristic lack of interest in his family and became forgetful. He later found the cause for his bizarre symptoms was a deadly glioblastoma (GBM) brain tumor. Gemma, Andy’s wife, says "life has returned to his eyes" following initial debulking surgery and months of treatment.

And despite the immense challenges, the father-of-four from Dorset will be scaling Yr Wyddfa, a 1,085 meter (3,560 feet) peak in Wales, on Saturday, July 6. Andy will be raising money and awareness for Brain Tumour Research - and his four-year-old daughter Isabelle will be right by his side on the climb. Andy, from Sturminster Newton, said: “The fact remains that this disease affects children more than adults.

"I know it’s too late for me, but I can’t leave a world where children are made to suffer like this. Something needs to be done. "This will be my first time tackling the mountain since my diagnosis.

"It will be harder than ever before, but I’m ready to push myself to the limit to fight this disease. "I’ve always dreamed of having a full English breakfast at the summit.