Re: Hold on there commander
Neither set of elections involve FPTP, they are not in France which does have FPTP, ie candidates are elected with 50%+1 of the vote in the first or second round of voting. Designed for the 4th and 5th Republics
Westminster elections are done on plurality, where the candidate in the constituency with the most votes wins. Could be 1 vote, could be by 1 vote. If there were only two candidates then one would by definition have 50% plus (outside of a dead heat), but very few Westminster elections (as opposed to LA ones) involve so few. More typical to have 4 or more, especially in a byelection.
Holyrood is most definitely not a combination of FPTP and PR, it is AMS, where candidates are elected in constituencies and then the regional votes (not national) are adjusted so that the result more fairly reflects the overall vote. It takes quite extreme voting patterns to get to an overall majority and it was assumed that this was never going to happen after the first two coalitions and then a minority government but the current SG had an overall majority, and on current polls that will continue after next years election. It has worked pretty well so far, with a few independents, greens, trots etc elected. I'd prefer if the party didn't get to agree the lists.