Mk XIV was in service from very early 44 to late 47 (in india) so D-day outfit would be ok. There was also a bunch of them modified for desert which have nice colors.
However, I think I will make it in scapa flow outfits (squadrons protecting the north fleet) and those never had the D-day strips.
Scapa-flow colors where light grey and slate blue as they where operating mostly above the sea.
As the XII PR (photo) has the same shape as the XIV (except unarmed, 4 longer blades prop, and shorter tail) I could make it also pink
Concerning the D520, 4 words resume them : too few, too late.
The first 20 were in squadrons only 1 month before WWII start, and 400 were available at the end of french campaign, and some with half the gunnery.
In this period, they took down 150 germans planes, for 80 losses, when they were fighting at 1 vs 4. And this, with pilots untrained on a powerfull but very hard to fly plane !