A 24-year-old woman was denied a bottle of wine at a Wimborne supermarket because her adult autistic brother, who does not drink, did not have ID.

Vicky Dallimore took siblings Michael, 22, Chloé, 19, and Emily, nine, to the Folk Festival so mum Lorraine could enjoy a rare day off.

On the way home she popped into the Crown Mead’s Somerfield Co-operative for some shopping, including a drink to take to a friend’s barbecue, but was turned away by a security guard.

She claims she was told Michael, who requires 24-hour supervision, still needed ID and the guard “didn’t care what he is”.

Chloé and Vicky both produced proof of age.

Lorraine from Longham said: “Michael went to wait outside because he gets agitated in queues.

“Vicky explained Michael was autistic, but the guard insisted.

“I was so mad when I heard. He might be used to talking to teenagers, but that’s very offensive. I couldn’t believe his attitude. It was the first day I’d had away in a long time, and this completely spoiled it.”

The mother of seven added: “The manager’s excuse was that not everybody has people skills.

“With a rival opening so soon, you’d think they would be a little more customer friendly.

“Just because his arms and legs work, it doesn’t make Michael any less disabled.

“I’m worried – when I die, will he be treated like a leper?”

A Somerfield spokesman said all stores operate a Challenge 25 policy, which applies to anyone with the purchaser.

“On this occasion one of the group was unable to provide proof of being 18 or over, and so the sale was refused,” he said.