Prue Leith has accidentally announced who wins this year's 'Great British Bake Off'.

Prue Leith

Prue Leith

The show judge - who was called in as Mary Berry's replacement alongside silver fox Paul Hollywood after the baking series shifted to Channel 4 earlier this year - has been left red-faced after she revealed who walked away as the champion in a pre-scheduled tweet, which has since been deleted, ahead of the series finale tonight (31.10.17).

Despite the blunder, the 77-year-old restaurateur has confirmed she's been asked to reclaim her judging position on next year's series alongside Paul, 51, while Noel Fielding and Sandi Toksvig have decided to reprise their hosting duties.

Alongside a link leading to contestant application forms for the next series, Prue said this morning: "It's the #GBBO final! Who will win? Thrilled to say Paul, Noel Sandi & I will all be back! Do you want to join us? (sic)"

Although she's confirmed she will be returning in 2018, Prue's future was uncertain earlier this month as she admitted Channel 4 were yet to give her a new contract.

She said: "I'm still hoping Channel 4 will ask me back for the second series. They've asked me about timings and schedules but I've not seen or heard anything about a contract. It could all change, like 'The X Factor'."

But, until she gets back in the tent, Prue has decided to throw herself back into writing.

She added: "I actually gave up writing before 'Great British Bake Off'. I'd been doing it [writing cookbooks and novels] for years and it took up too much time. But I've been coaxed back into it and now I'm writing and cooking more than ever. It's a busy time."