The election, and after

In any election in a reasonably democratic voting system — such as that used for the Scottish Parliament and the Welsh Senedd, for example — the number of seats in the resulting parliament assigned to a party is proportional to the number seats they won. So any party or coalition capable of forming a government must have a proportion of the vote close to, or exceeding, a majority. Britain isn't like that, of course. Britain isn't a well-functioning anything at all, still less a well functioning democracy.