Just out of curiosity Oli, did you mean the original version of Gorilla? The name is no longer synonymous with foaming-polyurethane glue, they make a white PVA and superglue and some other stuff now too.
I think you'll get on well with 502, as you would with other less-famous glues. Many are just as good as the American imports that command so much attention online and in the mags. Virtually any PVA is actually capable of creating joints stronger than the wood, once that mark is passed you can pick your adhesive based on price, availability, British-made, open time or whatever knowing you're not compromising on strength.