Penpusher, it wasn't any your list
However, what I should mention, just to see your reaction is this.....
I checked the second (plastic pipe hater) quoters CORGI number today, and got a different company name, with a different address, but in the same town. So I called the company and asked for an explanation. They said that they were simply changing premises and company name. Me being me (you all know I need as much info as possible) did a wee Google on the company name (the CORGI one) and address, and lo and behold, according to the Edinburgh Gazette someone was called in to help liquidate the company that the CORGI number was registered with, on, wait it, the 10th August.....
Me being me called the guy back and asked him to explain. He said that the company listed in the CORGI registration is the maintenance division of their company, and is certainly not in liquidation. I emailed him the link and haven't heard back since.....
As for the pipe, no idea of age, but it says down the side of all the pipe:
7Bar/82C KOMO CV KIWA PB 70C/1MP POLSKA INSTAL AT/98-01-00477 EMI A-825 if that's any help