manufacturers of the "woolly pully"

are there many manufacturers from the "woolly pully"?
is TW-kempton Ltd one of them?

I have a 1978, 2 1980 and a 1986 examples with TWK which could be the TW-Kempton you speak of, I also have ones from REMPLOY dated 1980, 1984/85 and Remploy undated VO26 a patchless 22C RAF variant with no dates.

And 2 current issue versions with no makers names just contract numbers showing as being 80% wool 20% nylon and the name changed from Jersey, Mans, Heavy Olive Drab to Jumper Utility, Round Neck Olive.

Well, It's just because I have questions about them being the real deal?
I have some of the real issued navy, army and airforce  jumpers, and then I bought one of their jumpers from their webstore, and when that arrived, I noticed some difference in manufacturing.
I'll see if I can make some images to show you all.

and the fact that it seems that they used two different batches of tissue.
To make the shoulder and elbow patches, and a different batch for the penpocket and shoulderloop?
That's something they never got away with when that were issued jumpers.