The fixed term parliament act came in as a result of cameron's coalition with Clegg. The latter insisted on a fixed term for fear he would get shafted. The events of the latter part of the past year highlighted the drawback of the ficed term. It created a zombie government, not allowed to call an election, because the left knew they would be crucified. And they were. Hooray!!!!!. Prior to the fixed term the calling of an election was the sole remit of the PM unless, toppled by a vote of no confidence.
No doubt when Brexit is done the act will be revisited and revoked.
Along with the supreme court
The Lorde
the BBC
kowrowing to the EU judicial system
EU fisheremen poaching our valuable fishing grounds