It is a Maple Leaf, yes. "No.5 Squadron began as a ground-attack and army co-operation squadron and has as its badge design a green maple leaf on a white background. The maple leaf commemorates the Squadron's close association with the Canadian Corps during the great battles on the Western Front in 1917 and 1918.".
The lower one is 11 Sqdn. and the front Lightning is from Lightning Training Flight (LTF) - all of which were based at RAF Binbrook.