The Fleet Air Arm Roll of Honour gives him as a Temporary Sub Lieutenant (Aviation Branch), Observer, No.784 Sqn, HMS Nighthawk. I’ve found him in the April 1945 Navy List as a Temporary Midshipman (A), seniority 13th Jan 45 (its in section 1581 if anyone’s interested). His name is spelt Philip in there. In the index for the July edition (correct to 30th June 1945 according to the note on the cover) he is still listed as Msm (A).