Because elections here aren't "announced". They're on a fixed 4-year schedule. Everyone knows they're coming, and if they start just a little sooner than the other guy this time, that may give them an advantage. Over time, it creeps earlier and earlier. Like retail stores putting out Christmas stuff in mid-october.
Obviously, in great Britain's recent election, nobody knew there was going to be an election until it was announced, so there was no way to jump the gun.
Obviously, in great Britain's recent election, nobody knew there was going to be an election until it was announced, so there was no way to jump the gun.