That was funny. I noted his pronunciation of mushy peas as mooshy peas. In my experience it’s always been mushy peas as in lush, rush, etc. What say my compatriots here? (And you guys in the US if in fact that delicacy has crossed the pond.)
"Mushy peas” isn’t a thing over here, but his pronunciation is about how we’d say it when describing the state of peas that come out of a can, or “tin”. Perhaps since he was addressing an American audience he pronounced it for our ears?
I lived a number of years in the U.K., and never heard there of mushy peas. A friend of mine in Toronto says that in Eastern Canada, at least, they’re a traditional dish—and he calls them “mooshy peas”.