"People who swear a lot about something that makes them angry also get over their anger quicker and then think calmly...whereas those who keep it inside keep it bubbling unhealthily...just thought that um...scientific...thought on the matter might...or might not, interest you."

Well, it seems to have some basis in truth.

swearing boosts morale

"all production was in the UK..."

Yes but, unfortunately, Hunter went bankrupt. I must admit that I've worn Hunter wellies for years (always bought the 'seconds' from the local tack shop) and I still use a pair that I bought ages ago. I can't comment on the new ones but it would seem that making them in the UK wasn't a viable proposition for whatever reason. I once approached them about ideas for their marketing, which was dire, but they weren't interested - in fact, they were quite rude and arrogant.