A mum-of-three who was told she was too big to go on a waterslide while on holiday has lost more than eight stone.

Sian Doulton, was celebrating her 30th birthday in Tenerife with her husband Graham Doulton, 41 and said she was a "hot sweaty mess".

Tipping the scales at 19st 2.8lbs, Sian tried to go on a waterslide but was told she was too big and was left mortified.

When she got back to the UK, Sian decided enough was enough and signed up for the 1:1 Diet by Cambridge Weight Plan - which involves smoothies and shakes.

(Photo: SWNS)

After ditching oven-ready meals, takeaways and snacks, Sian lost 8st 1lbs and said she feels like a new woman.

She now weighs 11st 1lbs and can fit into a size 10 with ease.

Sian, a maternity support worker, from Sandbach, said: "We went all-inclusive while we were away. I remember going down to the restaurant and having three to four plates of food.

"Walking about the resort my legs would be chafing, I was a hot and sweaty mess.

"One morning, I went to go on a waterslide and the lifeguard told me I was too big.

"I was mortified, I couldn't believe it - it was so embarrassing.

Sian Doulton before and after. (Photo: SWNS)

"I would walk around the beach and I couldn't walk very far and I knew that something had to change."

Sian went from a size 22 to a size 10 in eight months by cutting down on sugar, carbs and fat - documenting her journey on social media @slim.with.sian

She said: "I thought it was going to be much much harder, I have tried to lose weight before but it has never clicked.

"With the structure of the diet, it was so easy and freeing.

Sian and her husband on jetting off on the holiday which changed her life. (Photo: SWNS)

"For the first 12 weeks, I lost four stone, I didn't do any exercise, it was just the meal replacements.

"After the first 23 weeks, I started increasing my steps."

Since losing weight, Sian has had to buy a whole entire wardrobe and says she feels like a brand-new woman.

She said: "I don't know how to explain it. I don't feel like me, it is almost like I have imposter syndrome.

"It is really weird with how people are seeing me - it is just so different. I went to a conference with work and they were giving out free t-shirts.

"A woman looked at me and was like 'here is a medium it will fit you fine'. I was like 'no no I need an XL' but the medium did fit perfectly."

Diet before -

Breakfast: Three pieces of toast with butter

Lunch: Ready meal, usually mac and cheese with a chocolate bar

Dinner: Full sized three cheese deep pan pizza

Drink: Pepsi max

Snacks: Chocolate bar, crisps and sweets

Diet after -

Breakfast: A protein shake

Lunch: Bowl of soup with a satsuma and yoghurt

Dinner: Pulled Mexican chicken with nachos

Drink: Sugar free juice or water

Story by Ben Barry