A Sidcup father-of-two was left scratching his head wondering 'Wotsit all about' as he opened a bag of the snacks - which only had ONE crisp inside.

Software developer Andy Stubbs, 43, bought a multipack of the cheesy flavour corn puffs for lunch with his family.

But when he reached for one of the bags, taut with air, and shook it, Andy realised there was only one Wotsit inside.

He shook the bag to make his payroll manager wife Jane, 39, and two sons - Oscar, nine, and Harry, five - laugh, then decided to keep it unopened as a novelty.

Little Harry was desperate to open the bag and eat whatever was inside, but Andy decided to hold onto it "as a memento".

Andy was nudged by Jane to open the bag, though, when she read the story of 41-year-old Steve Smith, who found one baked bean in a Heinz tin.

The family gathered round the kitchen island table and filmed the moment Andy opened the bag on Saturday (7), and a single, perfectly-shaped Wotsit fell out.

Andy from Sidcup, said: "It's not often you get a one-Wotsit bag of Wotsits, is it?

"I'd bought a multipack for the family a couple of months back, and I'd gone to get a bag of Wotsits because - why not?

"Lo and behold - when I held the bag, I could feel it was full of air. I shook it around, and realised there might only have been one Wotsit inside.

"So I showed it to Jane and the boys, and we all cried our eyes out.

"Harry really wanted to open the bag, mostly because he wanted to eat it. But I said that it would be funnier to keep it as a memento.

"When Jane saw in the news about the guy who only had a one-bean tin of baked beans, she encouraged me to open it up and see.

"When I opened it, there was something slightly anti-climactic about it. We'd known for a while there was probably just one Wotsit.

"But it didn't stop the whole thing from being funny."

Andy, who bought the bag in June, but added: "It [the crisp] felt quite stale. I wouldn't let my son eat that."

A packet of Wotsits should contain an average of 42 puffs inside.