Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
It is very likely. IMHO if the two black stripes were applied why the third at the wing tips wouldn't. The Whirlwind had them painted black rather.
View attachment 528381
View attachment 528382
the pic source; Whirlwind Fighter Project
View attachment 528383
the pic source: Operation Starkey | Whirlwind Fighter Project
An old post, but I've only just come across it...I wonder if the 64 Squadron Mk.V actually had the black markings out to the wing tips as per the "Most Secret" drawing. I certainly looks like it in your photo