The advantage of Gill stuff is it has a lifetime guarantee. I've had 3 pairs of trousers and 1 jacket over the years. Leaks
and zip failures the usual problem.
Just send it back and a new one will be returned.
It seems that the longevity of oilskins is getting worse. I used to have a set of Henri-Lloyd Ocean Racer
in the 1980s. They did 8 seasons of hard offshore racing
before starting to leak. Also, why are oilskins so expensive? You could buy a bespoke tailored suit for the money
they are asking.