The unhealthiest desserts served up by Britain's chain restaurants have been revealed - with one chocolate fudge cake packing in more than 1,200 calories.

Toby Carvery's chocolate and Oreo mess, and Wetherspoon's millionaires sundae completed the top three most belt-busting puds, with 1,133 and 1,067 calories respectively.

All three contain more than half of a woman's daily recommended calorie intake.

All desserts were ranked by calorie count, sugar content, and saturated fat levels.

The Harvester chocolate fudge cake topped the sugar table with 128g per serving - four times the daily recommended amount of added sugar.

Meanwhile the Toby Carvery Oreo dessert topped the saturated fat table with 53g, twice the recommended daily intake for an adult.

Experts from health website Treated.com crunched the nutritional information from 24 high street eateries to come up with their league tables.

(© Treated.com)

A spokesman said: "There's little harm in ordering an indulgent dessert very occasionally. But 'very occasionally' are the crucial words in that sentence.

"Ordering and eating a dessert which exceeds (or for that matter even comes close to) 1,000 calories or 100 grams of sugar on a regular basis is going to pose a health risk, and increase someone's susceptibility to obesity, type 2 diabetes and heart disease.

"In full service restaurants, dessert portion sizes tend to be larger than those in fast food restaurants. Furthermore, full service restaurants specialise more in the dining experience, and as such desserts might be served with extras such as ice cream and sauces, to make them more presentable."

The amounts of sugar in food and drink Show all 6 1 /6 The amounts of sugar in food and drink The amounts of sugar in food and drink Minstrels A 42g bag contains 28.9g of sugar The amounts of sugar in food and drink Dairy Milk A 49g bar contains 26.8g of sugar The amounts of sugar in food and drink Skittles 45g of Skittles (about a quarter of a large 174g pouch) contains 40.4g of sugar The amounts of sugar in food and drink Ribena A 500ml bottle of Blackcurrant Ribena contains 23g of sugar, down from 50g/500ml after it was reformulated to avoid the government's tax on sugary drinks The amounts of sugar in food and drink Coca Cola A 330ml can of Coca Cola contains 35g of sugar The amounts of sugar in food and drink Innocent Smoothies A 250ml bottle of strawberries & bananas Innocent Smoothie (the middle size) contains 26g of sugar

There are some relatively healthy options on the high street, however, with Gourmet Burger Kitchen serving up tubs of Yeo Valley Ice Cream pots with 117 calories.

Yo Sushi also does a matcha roll with fewer than 250 calories.

Spokespeople for Wetherspoon, Toby Carvery, and Harvester all said that - in addition to the desserts highlighted - there are a range of healthier options on their menus.