He was born in Kendal, Westmorland and educated at Ardingly College in Sussex.
Sewell made two appearances for Dorset in the 1928 Minor Counties Championship against Cornwall and Wiltshire.
[1] Later, while in the British Raj, Sewell made two first-class appearances for the Europeans against Indians in the 1931–32 and 1932–33 Madras Presidency Matches.
[2] In the 1931–32 match, he scored 25 not out in the Europeans first-innings, while in their second-innings he wasn't required to bat.
[4] During World War II he was called up as an Emergency Commission with the rank of 2nd Lieutenant on 26 October 1940.