Four years ago, Jon from Cardiff had a radical idea: instead of shelling out hundreds of pounds on school uniforms that kids outgrow faster than you can say 'growth spurt,' why not swap them? That notion, born from the cost-of-living crisis, has snowballed into a website with over 200 schools involved and 8,000 items exchanged.

Jon started with a plastic collection box outside his house. Now, the Free School Clothes scheme has gone digital, and Jon reckons it could save Welsh families more than £50m a year. That's a lot of pennies, especially when the UK government puts the average annual cost of uniforms at about £343 for primary school children and £442 for comprehensive pupils. Multiply that by more than one kid, and you're talking serious money - enough to make any parent wince.

'The free online swap shop built around the school community and families means they can list their good quality outgrown school clothes and offer them to other families within the school community for free,' Jon explained. 'We always say second hand doesn't need to be mean second best.'

Jon's kids, Tom, 10, and Sion, six, help sort the clothes. Tom recalls the early days as 'chaotic,' with the front room full of uniforms and tables piled high. But chaos has its rewards: almost half of parents say they're worried about uniform costs, according to Save the Children and the Baby Bank Alliance. Elise, a mum of three, just picked up a uniform for her son Charlie and loves the savings: 'It's really expensive, I've got three kids - you've got to get jumpers, T-shirts, trousers, shoes, double all of them because of the washing, so it's amazing for saving money.' She adds that she rarely buys new, preferring 'pre-loved' items, and can always find what she needs - 'nine times out of 10 somebody would be able to go, oh yeah, I have actually.'

The scheme started at Ysgol Treganna in Cardiff in 2022, where deputy head Gareth Evans and Tom bag up unclaimed lost-and-found items for Jon to list online. Jon's mission extends beyond finances: 'This is helping families to save both their pocket and the planet.' With 30,000 schools in the UK, the potential is huge, but Jon's real goal is a 'culture change' so that swapping second-hand uniforms becomes 'normal practice.'

Kingsbury High School in London, with 2,000 pupils, has joined in. Sustainability lead Tara Randall notes the scheme removes stigma: 'There's a certain street cred that kids like to follow, especially at secondary school. But this is done in a discreet way, so there's no stigma.' Parents can arrange their own drop-offs, and it might even help them connect in what can feel like a remote community.

For those who still can't swing it, Wales offers grants up to £200 per child for low-income families or those in care. And from September, England will limit school-logo items to three (plus a tie for secondary schools) to ease the burden. But for Jon, the swap shop is the real game-changer - because nothing says 'back to school' like reusing a blazer that's seen one too many playgrounds.