Wander, that was the point.
The No 2 for officers was declared non-uniform around 1962. You were allowed to wear out your existing uniform. There was a rush to buy barathea No 2s, the more extrovert u/t pilots opted for salmon pink lining :
Naturally these No 2 were still in use in the late 60s.
The V-force zuit suit was also available to Lightning and PR9 crews. It was designed as a uniform to be worn over g-pants and an AVS. The Mk 1 crews didn't wear g-trousers and were never entitled to the zuit suit which was actually a flying suit.
They eventually disappeared from stores in the middle-late 60s. When I went to Cyprus the hot rumour was there were still some to be had. I nipped along to stores but they only had zuit suits for gorillas - over 6 foot and over 200 lbs. Not deterred I said I would have one. The Paki tailor then modified it losing several inches in all directions until it was a good fit.
In fact even the original ones in UK were usually taken to the tailors for judicious tweaking.