The brothers who play in the dark: Vincent and Zakkery's allergy to SUNLIGHT means they must be fully covered up or go outside at night

When Vincent (left), one, and Zakkery (right), 10 months, from Barnsley, are exposed to light, their faces swell up and they develop a painful rash. 


The boys haven't been given a diagnosis, but doctors suspect they may have an ultra-rare condition called Erythropoietic Protoporphyria, which leaves the skin more sensitive to UV rays. Their parents can't let them leave the house without covering them up and placing them in a pram with a sunroof shade. During the summer, the family set-up a paddling pool (top right) in the living room to allow them to pretend they were outside - but the curtains remained shut.