By Stephanie Balloo & Charlie Duffield An otherwise “healthy” gas engineer was left questioning “how long he had left” following a heartbreaking cancer diagnosis a mere week before Christmas. Mitch Middleton, 27, was given the news that he had an inoperable brain tumour after experiencing headaches alongside sickness, while travelling to New York alongside his girlfriend for a festive holiday. As the symptoms continued on the holiday, Mitch, from Tamworth told Birmingham Live that he “knew something wasn’t right” and went to A&E upon returning home. It was then he was handed a heartbreaking di…