when i visited the UK in 2005 i remember people saying "yeah" after everything.
eating at Nandos in Cambridge ( the best chicken sandwiches ) "what kind of sandwich do u want yeah" "do u want any hot sauce on that yeah"
the dumbest thing i saw was at Heathrow, u have to pay for parking, go get your vehicle then leave the lot, if not done in time u have to pay again.