Lanc Squadron designations in your note
Well … The photo is from Mildenhall 15 Sqdn 1944 … from the logbook of the navigator it could be any of the following ….
LL859 Q
LL854 S
ME695 R
ND958 H
LM238 T
LL923 C
LM473 P
ME849 F
LD475 M
But another photo of the same day with a little more of the aircraft may help ????

In case this is of interest;
My father did his second tour of Ops with XV Squadron as XV Squadron Signals Leader from March 1944 until the end of the War. As Signals leader he was not part of a specific crew and flew with all the different crews. I don’t know if this will help at all by narrowing the dates down to when this photo was taken but over the period between March ’44 and February ’45 my father flew in LS-C, LS-F, LS-H, LS-P, LS-Q and LS-Z and in some instances the a/c designated with the squadron letter bore a different serial number due to losses.
I am setting out below the date, serial number and squadron designation of each aircraft at the time
March 16, ’44 LS-Q = W4181
May 14, 17 ’44 LS-H = ND958
Sept 3 , ’44 LS-F = ME849
Sept 6, ’44 LS-Z = PD285
Oct 28, ’44 LS-C ME844
Feb 18,22 ’45 LS-P = NG364