Prime Minister Keir Starmer is weakened by disastrous results for his Labour Party in Thursday's elections. In Wales, a Labour stronghold for a century, the party only finished fourth, while the main winner, Reform UK, has established a local base.

Scottish and Welsh nationalism will be further radicalised if Reform UK sets the tone of debate over inclusion in the British state, says Guardian columnist Rafael Behr

As Labour faces record-breaking losses in Thursday’s local elections, prime minister says rivals are unfit to lead