Complex sentence: During World War I he was a temporary Captain in the RAMC and served as Assistant Surgeon at the St John's Ambulance Brigade Hospital with the BEF and was anaesthetist in the War Hospital at Le Touquet France.
Split into simpler sentences: During World War I he was a temporary Captain in the RAMC and served as Assistant Surgeon at the St John's Ambulance Brigade Hospital with the BEF. He was also anaesthetist in the War Hospital at Le Touquet France.