The third of four brothers diagnosed with a rare life-threatening disease has gone into hospital to prepare for a bone marrow transplant.
Nathan was due to go into Great Ormond Street Hospital
Nathan Hartley and his brothers Daniel, Joshua and Luke, from Romsey, Hants, suffer from the genetic disorder X-linked lymphoproliferative syndrome.
The 11-year-old arrived at Great Ormond Street Hospital on Tuesday.
Joshua, 13, and Daniel, nine, had their transplants in 2004, while Luke, five, is scheduled to have his next year.
The brothers were diagnosed with the syndrome, which attacks the immune system, in November 2003.
Their parents, David and Allison, were told their sons were unlikely to reach their teenage years without a bone marrow transplant.
The syndrome is one of the world's rarest disorders affecting about 100 families world-wide.