For UK general elections (what we call elections to Parliament, our national legislature), the UK is divided into 650 constituencies, each of which elect one MP by FPTP. There is no party-list component.

The situation is different for other elections:

• STV: used in all Northern Ireland elections (except general elections), Scottish local elections, and Welsh local elections starting from 2027, subject to the council choosing to do so itself
• AMS (Additional Member System): used for elections to the Scottish Parliament, Senedd (Welsh Parliament), and Greater London Assembly
• Closed Party List: used to elect the Senedd starting from 2026, and formerly used for elections to the European Parliament prior to Brexit
• FPTP: used in all other elections

AMS is what we call MMP. Assemblies elected by AMS are composed of some single-member seats elected by FPTP which are then grouped into larger regions, each of which are allocated a certain number of seats to be used for the proportional component. These also use closed party lists, and is probably where the idea that our FPTP system is FPTP + party lists. It’s not: FPTP is exactly the same in the UK as it is in the US. If there’s any component on top of that, we call it AMS.

I turn 29 in a few months and scored 2. I would not be surprised if I’ve forgotten an instance of using a typewriter or listening to a boombox outside though.