First Past the Post (FPTP) or Simple plurality, is the traditional system of voting in general and local elections in the UK.
Candidate with the highest number of votes wins, and that in the UK it limits the number of winners to one for each constituency.
It's simple to operate.
There is no minimum quota for the number of votes the winner has to get.
Therefore: it is plurality rather than majoritarian.
Currently, and MP will represent about 70,000 electors.