Clenell Percy Collingwood (230) was born on 1st April, 1907 in Hong Kong.
He was educated at Clifton and the Royal Military Academy, Sandhurst, which he entered as a cadet in 1927. He was commissioned in 1928.
London Gazette 15th February 1901
He was Mentioned In Dispatches as a Major, in the acting rank of Lieutenant Colonel, on 22nd August, 1946 for his work in the Far East.
These reports helps a little with understanding the guardianship / name change notice above.
He married, in early 1939 in Durham, Maud Oliver Appleyard (279). She was born on 13th March, 1909.
Bath Chronicle and Weekly Gazette 9th May 1942
In 1942 they were living at 7 Hurle Crescent, Clifton, Bristol.
Clennell Percy and Maud Oliver Collingwood had one child – Clennell H Collingwood, born in 1940.