Powell details in 'Dance' how young officers would tease Widmerpool by giving all the signs of preparing to render him a salute and then at the last moment refraining from doing so. It's the sort of pricking of petty pomposity that we English are really quite good at.
The Standard reports today that Hackney's litter enforcement officers are following smokers around with video cameras. As far as littering is concerned, smokers are an easy target. You know exactly when the offence will occur.
It strikes me that some mischievous smokers may take some minor pleasure in leading these people a merry dance.