I think Briar Lee is exactly right and there's evidence to suggest it was definitely Comoy, at least in some and perhaps in all cases. To use the example at hand the English Weber bulldog shown by Ryan above is a shape 65. Here's an identically shaped Comoy Golden Arrow that stamped 65:
View attachment 280899
Here's another example, also a bulldog, that features identical nomenclature to the OP's pipe This one is for an English Weber shape 675. First note the overall shape:
View attachment 280903
Then the font and placement of the MADE IN ENGLAND:
View attachment 280904
Finally the font and placement of the LONDON MADE:
View attachment 280905
And for comparison here is a Comoy Super Sports bulldog shape 675:
View attachment 280906
I think finding several models with identical shape numbers on Weber and Comoy pipes is pretty solid evidence that Comoy made some if not all of the English Webers. And while it's possible that Weber may have contracted with other English makers I'm not sure why they would have added needless complexity to their supply chain. In any case there's no doubt in my mind Comoy was one of (if not the only) UK pipemaker Weber used.