Millions of people are preparing to head to the polls across Britain on Thursday.

They'll be voting for thousands of local council seats in England - while people in Scotland and Wales will elect members of their respective devolved parliaments.

But the results could have a huge impact on national politics. So, what happens to the prime minister if Labour loses as badly as expected? And does a good night for the Greens or Reform UK really mean they are banging on the door of Number 10?

Niall previews what to expect at the polls with Cathy Newman - host of the Cathy Newman Show on Sky News from 7pm on Monday to Thursday.

Have you got a question for Niall? Email the show – [email protected]