Claud Butler Regent - Tubing Help Pls!

[Peachy!]

As you and @hamster have already deduced, it’s likely the 1997 version (the Star Trek head badge design is circa 1996-1999 & we know it’s neither ‘96 or 98’) 1997 was a bit of a watershed as Brigg tried different ways of making home production viable, so this may have been an attempt to get a cheaper tube although I wouldn’t have thought Columbus was much different price wise. Perhaps they hadn’t paid their Reynolds bill?
By the end of 1998 pretty much everything was now getting produced abroad then shipped in to Brigg just to be bolted together.