A huge Humpty Dumpty sculpture has appeared on top of a wall in central London - and he's been put back together again. All the king's horses and all the king's men seem to have been busy, as the two-and-a-half metre-high egg is fully bandaged up. The installation was hand crafted over 28 days and weighs more than 85 kilos and is perched on top of a wall in Potter’s Field.

It follows research by Yoplait, the makers of Petits Filous, which revealed nine in 10 parents feel confident they understand their child’s nutritional needs – but doubt if they are meeting them.

The poll of 2,000 mums and dads of kids aged four to 10 found 58% regularly worry about whether they are giving their little one the right nutrition, despite claiming their knowledge is good.

It served to highlight such confusion, with 28% unsure about sugar content in food, 25% unclear about what counts as a ‘balanced diet’, and 24% struggling to spot signs of nutrient deficiencies. And 34% blame unclear food labels, while 29% simply don’t have access to the expert advice they need.

According to Yoplait, calcium intake has fallen sharply over the past decade, and almost 20% of 4 to 10-year-olds are now deficient in vitamin D each spring, with their long-term bone health under serious threat. Yet, many parents mistakenly assume this is a problem for later life, missing the opportunity to strengthen bones while they’re still developing.

As a result, the brand has teamed up with bestselling children’s author and dad-of-three Tom Fletcher to launch a national campaign tackling the hidden crisis of childhood calcium and vitamin D deficiency - starting with a reimagining of nursery rhyme icon Humpty Dumpty.

Once a symbol of fragility, Humpty is now reborn to bounce back stronger, highlighting the importance of calcium and vitamin D to build healthy bones from an early age.

Tom Fletcher said: “As a parent, I know how easy it is to get caught up in the chaos of daily life - and nutrition can sometimes take a back seat. But what people don’t realise is that calcium and vitamin D deficiency in children is quite common. If kids don’t get enough during their crucial growing years, it can have a lasting impact on their bone health. The great news is that it’s easy to make a difference.

“Something as simple as adding a fortified yoghurt to their daily routine can give them the calcium and vitamin D they need to build healthy bones. I loved reimagining the Humpty Dumpty rhyme for this campaign - it's such a lovely and playful way to deliver a serious message. Humpty’s great fall is the perfect reminder of what can happen when we don’t build our kids up properly from the inside out.”

The research suggests a major part of the crisis is down to confusion with social media myths, shifting trends, and conflicting health advice pushing parents away from trusted sources of nutrition. Nearly three in 10 avoid yoghurt due to concerns about sugar or artificial sweeteners - often influenced by online misinformation.

While 53%t know that brittle bones, delayed growth (40%), and rickets (40%) as indicators of calcium or vitamin D deficiency, this awareness doesn't always translate into action.

It also emerged 31% struggle to get their children to eat enough nutrient-rich foods, while 22% don’t understand how much of each nutrient their child needs, and the same amount have never heard of food fortification.

Speaking in partnership with Yoplait, which has collaborated with Mumsnet and the National Schools Partnership to reach thousands of families at home and in schools to drive action and awareness, dietitian Dr. Carrie Ruxton said: “Many parents still underestimate the value of simple foods like fortified yoghurts, which are packed with the nutrients kids need.

“There’s been a trend towards parents swapping out yoghurts for less nutritious options like biscuits or unfortified snacks but this would have the effect of limiting the essential nutrients that children need for growth and development.”

Antoine Hours, from the brand, added: “Parents are navigating conflicting advice about nutrition, leaving them often uncertain about whether their children are getting the right nutrients. Small dietary changes, like adding calcium-rich foods such as fortified yoghurt, can have a significant impact.

“Humpty Dumpty has long been recognised as a symbol of fragility. With Tom Fletcher’s updated version of the story, he serves as the perfect icon to remind parents and children alike of the importance of nutrition in growing up strong and resilient.”