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Some of the nation's most popular hot drinks are fuelling an obesity crisis, health officials sayiStock

Hot drinks containing "shocking" levels of sugar are being sold by popular high-street chains, according to a campaign group as Starbucks, Costa and Caffè Nero are accused of stoking a national obesity crisis by selling sugar-laden beverages.

Research by Action on Sugar found a third of the nation's favourite hot flavoured beverages contain the same or more sugar than a can of Coca-Cola, with some having a staggering 25 teaspoons of sugar – three times the recommended daily intake.

The worst offender was a large, or 'Venti', version of Starbucks' Hot Mulled Fruit Drink, which comes in either grape with chai or orange and cinnamon flavour. The drink contains 99g of sugar, the equivalent of eating five muffins.

Costa's largest Chai Latte contained the next highest level, at almost 80g, while drinks from KFC and Caffè Nero also featured in the list of top 20 worst offenders. The organisation's research said 98% of the 131 hot flavoured drinks found in the high-street chains would carry the Food Standards Agency "red" warning label for excessive levels of sugar.

Here is the full list of the worst offenders, according to the research carried out by Action on Sugar (the recommended daily intake of sugar for adults and teenagers is 30g/seven teaspoons):

Store Drink Sugar (g) Sugar (teaspoons)
Starbucks Hot Mulled Fruit - Grape with Chai, Orange and Cinnamon Venti 99 25
Starbucks Hot Mulled Fruit - Apple with Chai, Dried Apple and Cinnamon Venti 88 22
Costa Coffee Chai Latte Massimo - Eat In 79.7 20
Starbucks Hot Mulled Fruit - Grape with Chai, Orange and Cinnamon Grande 76 19
Starbucks White Chocolate Mocha with Whipped Cream Venti 73.8 18
Starbucks Hot Mulled Fruit - Apple with Chai, Dried Apple and Cinnamon Grande 69 17
Starbucks Signature Hot Chocolate Venti 60 15
Starbucks White Chocolate Mocha with Whipped Cream Grande 59.1 15
KFC Mocha 58.8 15
Costa Coffee Mocha Latte Massimo - Eat Out 57.5 14
Costa Coffee Mocha Latte Massimo - Eat In 56.3 14
KFC Hot Chocolate with cream 54.3 14
Costa Coffee Hot Chocolate Massimo - Eat Out 54 14
Costa Coffee Hot Chocolate Massimo - Eat In 53.1 13
Costa Coffee Mocha Massimo - Eat Out 52.6 13
Starbucks Chai Tea Latte Venti 52 13
Starbucks Hot Mulled Fruit - Grape with Chai, Orange and Cinnamon Tall 52 13
Costa Coffee Mocha Massimo - Eat In 51.7 13
Caffe Nero Caramelatte - Drink In 50.6 13
Costa Coffee Chai Latte Medio - Eat In 49.3 12
Starbucks Signature Hot Chocolate Grande 47.4 12
Starbucks Hot Mulled Fruit - Apple with Chai, Dried Apple and Cinnamon Tall 47 12
Eat Matcha Latte Big 45.2 11
KFC Mocha 45.1 11
Greggs Mocha Large 45 11
Starbucks White Chocolate Mocha with Whipped Cream Tall 44.4 11
Starbucks Mocha with Whipped Cream Venti 43.2 11
McDonalds Mocha Large 43 11
Eat Chai Latte Big 42.8 11
Pret a Manger Orange Spiced Hot Chocolate 42.2 11
Starbucks Caramel Macchiatto Venti 42.1 11
KFC Hot Chocolate with cream 42 11
Starbucks Classic Hot Chocolate Venti 41.8 10
Starbucks Chai Tea Latte Grande 41.5 10
Caffe Nero Hot Chocolate with Whipped Cream - Drink In 41 10
Starbucks Pumpkin Spice Latte with Whip Venti 39.2 10
McDonalds Mocha Medium 38 10
Costa Coffee Mocha Latte Medio - Eat In 37.7 9
Costa Coffee Mocha Latte Medio - Eat Out 37.7 9
Starbucks Signature Hot Chocolate Tall 36.4 9
McDonalds Hot Chocolate Large 36 9
Costa Coffee Gingerbread Latte Massimo - Eat Out 36 9
Caffe Nero Hot Chocolate Milano with Whipped Cream Drink in 35.7 9
Costa Coffee Cinnamon Latte Massimo -Eat Out 35.4 9
Costa Coffee Vanilla Latte Massimo -Eat Out 35.3 9
Costa Coffee Roasted Hazelnut Latte Massimo -Eat Out 35 9
Eat Matcha Latte Small 34.9 9
Costa Coffee Gingerbread Latte Massimo - Eat In 34.9 9
Costa Coffee Hot Chocolate Medio - Eat In 34.8 9
Costa Coffee Vanilla Latte Massimo -Eat In 34.8 9
Costa Coffee Hot Chocolate Medio - Eat Out 34.8 9
Costa Coffee Hot Chocolate Primo - Eat Out 34.8 9
Costa Coffee Caramel Latte Massimo -Eat Out 34.6 9
Costa Coffee Mocha Medio - Eat In 34.4 9
Costa Coffee Mocha Medio - Eat Out 34.4 9
Costa Coffee Cinnamon Latte Massimo -Eat In 34.2 9
Greggs Mocha Regular 34 9
Costa Coffee Roasted Hazelnut Latte Massimo -Eat In 33.9 8
Costa Coffee Caramel Latte Massimo -Eat In 33.5 8
Caffe Nero Chai Latte - Drink In 33.2 8
KFC Caramel Latte - Large 33.2 8
Eat Chai Latte Small 33 8
Greggs Hot Chocolate Large 33 8
Starbucks Mocha with Whipped Cream Grande 32.9 8
Starbucks Classic Hot Chocolate Grande 32.9 8
Eat Hot Chocolate Big 32 8
McDonalds Toffee Latte Large 32 8
Costa Coffee Chai Latte Primo - Eat In 31.9 8
Starbucks Chai Tea Latte Tall 31.3 8
Starbucks Caramel Macchiatto Grande 31 8
Starbucks Pumpkin Spice Latte with Whip Grande 30.6 8
Pret a Manger Hot Chocolate 30.3 8
Starbucks White Chocolate Mocha with Whipped Cream Short 29.9 7
Eat Mocha Big 29.2 7
McDonalds Vanilla Latte Large 28 7
Costa Coffee Mocha Latte Primo - Eat Out 27.5 7
Caffe Nero Luxury Hot Chocolate - Drink In 27.3 7
McDonalds Hot Chocolate 27 7
KFC Caramel Latte 26.8 7
Costa Coffee Gingerbread Latte Medio -Eat In 26.6 7
Costa Coffee Gingerbread Latte Medio -Eat Out 26.6 7
Starbucks Mocha with Whipped Cream Tall 26.3 7
Costa Coffee Cinnamon Latte Medio -Eat In 26.1 7
Costa Coffee Cinnamon Latte Medio -Eat Out 26.1 7
Costa Coffee Vanilla Latte Medio -Eat In 26.1 7
Costa Coffee Vanilla Latte Medio -Eat Out 26.1 7
Costa Coffee Roasted Hazelnut Latte Medio -Eat In 25.9 6
Costa Coffee Roasted Hazelnut Latte Medio -Eat Out 25.9 6
Starbucks Classic Hot Chocolate Tall 25.8 6
Costa Coffee Caramel Latte Medio -Eat In 25.6 6
Costa Coffee Caramel Latte Medio -Eat Out 25.6 6
Starbucks Caramel Macchiatto Tall 25.5 6
KFC Vanilla Latte 25.4 6
Costa Coffee Mocha Latte Primo - Eat In 25.2 6
McDonalds Toffee Latte Medium 25 6
Greggs Hot Chocolate Regular 25 6
Eat Hot Chocolate Small 24.6 6
Caffe Nero White Chocolate Mocha - Drink In 24.5 6
Costa Coffee Mocha Primo - Eat Out 24.4 6
Costa Coffee Hot Chocolate Primo - Eat Out 24.3 6
Caffe Nero Mocha with Whipped Cream - Drink In 24.3 6
Starbucks Pumpkin Spice Latte with Whip Tall 24.1 6
Starbucks Signature Hot Chocolate Short 23.9 6
Costa Coffee Mocha Primo - Eat In 23 6
Costa Coffee Hot Chocolate Primo - Eat In 22.6 6
Eat Mocha Small 22.1 6
Leon Mocha 22 6
Pret a Manger Love Bar Latte 21.8 5
Pret a Manger Orange Spiced Latte 21.4 5
McDonalds Vanilla Latte Medium 21 5
Starbucks Chai Tea Latte short 20.9 5
Pret a Manger Mocha 20.7 5
KFC Vanilla Latte 19 5
Costa Coffee Gingerbread Latte Primo -Eat Out 18.5 5
Costa Coffee Cinnamon Latte Primo -Eat Out 18.2 5
Costa Coffee Vanilla Latte Primo -Eat Out 18.2 5
Costa Coffee Roasted Hazelnut Latte Primo -Eat Out 18 5
Costa Coffee Caramel Latte Primo -Eat Out 17.8 4
Costa Coffee Gingerbread Latte Primo -Eat In 17.4 4
Leon Hot Chocolate 17 4
Costa Coffee Cinnamon Latte Primo -Eat In 17 4
Costa Coffee Vanilla Latte Primo -Eat In 17 4
Costa Coffee Roasted Hazelnut Latte Primo -Eat In 16.9 4
Starbucks Mocha with Whipped Cream Short 16.8 4
Starbucks Classic Hot Chocolate Short 16.8 4
Costa Coffee Caramel Latte Primo -Eat In 16.7 4
Starbucks Pumpkin Spice Latte with Whip Short 15.6 4
Starbucks Caramel Macchiatto Short 14.7 4
Costa Coffee Chocolate Babycinno 12.9 3
Costa Coffee Mocha Cortado - Eat Out 12.1 3
Costa Coffee Mocha Cortado - Eat In 10.4 3