 On 29 April 1945, Meiklejohn arrived at Bergen-Belsen concentration camp shortly after its liberation by British troops with the responsibility of administering the starvation diet to the severely malnourished and dying inmates.He led one of two teams sent on behalf of UNRRA, the other team being led by Janet Vaughan.At the time, the death rate at the camp was estimated at 500 or 600 per day when he was sent either 95, 96 or 97 volunteer medical students from London medical schools, to assist him in camp I, at the request of Brigadier Hugh Glyn-Hughes and the war office.