Reform, Plaid Cymru, the SNP and the Greens are all banking on big gains and nationwide repercussions

On 7 May, three of the UK’s four nations go to the polls in a series of elections with much potential significance, not just for who ends up governing various bodies, but also for the future political direction of the country.

Here is what is at stake.

In Scotland, voters will select 129 members of the country’s parliament, via a mix of first-past-the-post constituency voting and proportional regional voting. In Wales, a revised proportional system will pick 96 members of an expanded Senedd.

In England, there are first-past-the-post votes for members of more than 130 councils of various types – metropolitan, unitary, county, district and 32 London boroughs – as well as for six mayors. Some authorities are re-electing all councillors, some a third of them.