In December 1944, he left Canada for England and, after the Nazi surrender, was stationed at Celle, Germany as part of Royal Air Force 84 Group Disarmament HQ Unit.

Being stationed near the Bergen-Belsen Concentration Camp, Aplin became interested in the welfare of the camp victims, many of whom were interned at Bergen-Belsen long after its liberation. To aid the survivors, he organized a system using the Armed Forces Postal System to put internees in contact with their families and friends, and collected goods from Canadian families for distribution at the camp. His work at Bergen-Belsen led many survivors to refer to him as "The Angel of Belsen".

Letter from Ted Aplin to wife Elinor, 28 December 1944.

Letter written to son David, June 1945

Letter written by Ted Aplin to Lilian Sandler, a family friend, regarding conditions in the camp, 17 June 1945.

Aplin family posing for portrait on front steps of their home.