Polls opened across the UK on Thursday morning as voters are set to elect a number of local councils and several mayors, as well as the composition of the Scottish and Welsh parliaments. The vote is expected to see major gains for the far-right Reform party as well as the left-wing Greens, while the ruling, center-left Labour Party is likely to face major losses, piling further pressure on embattled Prime Minister Keir Starmer . What is being voted for in today's UK elections? Some 5,000 local council seats are up for grabs across 136 councils, with six mayoral contests also being decided. The devolved parliaments in Scotland , known as Holyrood, and in Wales, known as the Senedd, are also being voted for. While local councils are responsible for issues such as garbage collection and potholes, the vote will most likely be seen by voters as a referendum on the prime minister.…