Loch was seconded from his regiment to the staff on 9 October 1899,[REF] serving as divisional signalling officer, South African Field Force in the Second Boer War [REF].
Loch returned to regimental duty in the Grenadier Guards on 23 January 1902,[REF] and took part in a special diplomatic mission to promote British interests in Morocco in early 1902 [REF].