Election season can be an opportunity to signal a change in behaviour. Arguably the politics of behaviour is one of the key crucibles of any modern election. People change their habits and do so regularly.

For example, in the 1970s, people lit up almost anywhere, smoking away in other people’s houses, in pubs and on buses. Today, smokers congregate outside. In the 1980s, drink driving was common. It was regarded as a bit iffy but we did it.