Olivia Colman shocks with her choice of crumpet topping as she is the latest Hollywood star to appear in a Warburtons advert

Most households could safely agree they like butter on their crumpets.

But for Olivia Colman, it appears not.

The British actress, 51, has sparked a debate, revealing she likes yoghurt and strawberries on her crumpets for breakfast.

Wearing a long brown chic coat, black jeans and a heeled boot, Colman descends upon the Bolton bakers under the ruse of determining whether Warburtons crumpets are worthy of ‘National Treasure’ status.

Following a series of notable A-list-ers to team up with the family bakers – including Robert De Niro and Samuel L Jackson – Olivia Colman is the latest star to appear in the advert, which celebrates Warburtons dedication to making the best quality crumpets.

Throughout the advert The Crown actress reviews a range of toppings including butter, jam, cheese, avocado and even mustard.

She then reveals her favourite topping is in fact strawberries and yoghurt.

The ad comes as 71 per cent of crumpet-eating Brits say they consider the humble crumpet a cornerstone of British culture, while 41 per cent agree they deserve National Treasure status and should be ‘protected at all costs’.

The research also showed butter is the front runner when it comes to our favourite crumpet topping, 75 per cent, followed by jam, 30 per cent, but only 23 per cent have tried cheese and even fewer, four per cent, have tried avocado.

Despite Colman’s clear contempt for a mustard-topped crumpet in the ad, not everyone agrees, with a surprising eight per cent of respondents saying that the tangy condiment pairs well with the iconic British staple.

Ms Colman was announced earlier this month to star in Netflix’s Pride & Prejudice six-part series.

The Crown’s Emma Corrin will star as Elizabeth Bennet, with Slow Horses’ Jack Lowden portraying Mr. Darcy, with Colman taking on the role of Mrs. Bennet.

The adaptation will be penned by Dolly Alderton and directed by Euros Lyn, who will also serve as an executive producer alongside Emma.

Filming for the series will begin later this year in the UK.

She is also starring alongside other British actor Benedict Cumberbatch in the remake of Hollywood classic War Of The Roses which will be released later this year in September.