I always notice "rolled out". I could be wrong, but I certainly think of it as government jargon. A few years ago, when Bookstart (the scheme that gives free books to babies and toddlers) was being extended, we were told to tell enquiring public that the books were being rolled out across the country over the next few months, which created a very nice image in my mind.

Someone I work with is very good at using phrases like this, but even better at getting them wrong. He talks about going through documents with a fine tooth-comb, but he's hardly alone in this. His best, though, was when he said that staff "really had the bit beneath their belt and were turning up the volume." I think this was considered a good thing.

Many Morris dances have step changes, perhaps going from a double-step in the figure to a series of capers in the chorus. A step change in city bonuses therefore probably consists of six Cotswold Morris men, ceremonially dancing on the people who received them, while their Fool hits them with a bladder.