My Father William Saviel Army Records

Hi all I am searching for my father William Saviel Army record information he was in the Royal Army Medical Corps. in 1942 in Burma and his sister Doris Hazel Saviel was also in the Royal Army Medical Corps in 1942 in Burma.
His brother Harold Saviel was in the Royal Artillery in 1941 in Burma.
If you can help let me know.

yours faithfully,
George T Saviel
8th of February 2015