From the Lancashire Telegraph, an eyewitness describes the street dust-up between a couple of ice cream vendors, which involved smash windows and an intentional rear-ending [captured on video at the link]:
“It all came down to a turf war.
“One was offering four, two scoop cones with a flake for £2 and the other said he would do them all for 10p cheaper.
“I couldn’t believe it when Mr Yummy jumped out of his van and smashed Mr Whippy’s window, you just don’t expect that around here.”