Bob Watkinson wrote:

erm, no I've just re read 3.6.2 and it doesn't mention 314-01-01 or 02.
Although I accept your version may be newer

I suspect yours is ancient. I have every edition back to the original
red one (1992). Mention of 314-01-01 first appeared in the green
edition (1995) and of 314-01-02 in the blue one (2002) - the latter
being the one that introduced us to the term the term "shower cubical"
(sic)! We are now on the brown (2004) edition which still has cubical
showers.

I agree with everything else you say.

--
Andy