Labour and the Conservatives have dominated British politics for more than 100 years. But local and devolved elections being held across the UK could be about to change that forever, and potentially mark the end for Labour leader Sir Keir Starmer.

ITV News' election expert Professor Jane Green has been given access to YouGov polling data that suggests that we might be at a tipping point, where challenger parties like Reform UK, the Lib Dems, the Green Party, Plaid Cymru, and the SNP could be set for some of their best results ever.

In this video, we’ll look at what this data reveals, how Nigel Farage’s Reform UK and Zack Polanski’s Green Party could potentially unseat Labour and the Conservatives, and how this all means the future of British politics could be set to change indefinitely.