For reference for non-UK people: anyone can apply to be a Member of Parliament for your local area, assuming you can pay the initial fee (you get it back if you get enough votes). The prime minister (and other cabinet ministers) are also MPs for a local area. This means that you can get some fun photos on election day into the newspapers when journalists turn up to capture the results of the local vote for senior MPs. For example: https://ichef.bbci.co.uk/images/ic/1200x675/p07xt6k2.jpg