Photograph shows one of the first visits Douglas made to see Luke, who was almost three at the time, but had never left Portimao Hospital in Portugal.

After just one session with Douglas, his mother wrote: “Luke is doing great at the moment. We have seen a difference in him since the day Douglas came to see him. He seems to have more energy as if a little light has been switched on inside… He now holds reading books, which is a new and exciting thing for us. We would love Douglas to come and see him again.”