A new unicorn biscuit is on sale at Waitrose stores nationwide thanks to a Swindon six-year-old.

Millie Horbunowicz, from Moredon, wrote to the supermarket giant after she couldn’t find her favourite mythical beast among the range of dragons and dinosaurs in the biscuit isle.

Waitrose responded by getting supplier Original Biscuit Bakers to produce a brand new novelty biscuit, shaped and decorated like a unicorn.

After the launch of gingerbread treat a delighted Millie said: “I really, really like the biscuit, because it has my favourite unicorn colours and it’s named after me.

“The colouring, gold unicorn feet and head horn are just perfect and it was delicious, I give it 11 out of 10.

She added: “I really like unicorns. If I was a biscuit, I would be a unicorn.”

Millie’s aunt, Val Shepherd, said: “It’s amazing to see how Millie’s initial letter sent to the Waitrose Baker has been received so enthusiastically, developing into a new unicorn biscuit, now on sale in over 240 Waitrose shops through England.

“Millie is a delight to be with. She has a very enquiring mind, so any time spent with her is enlightening.

“It’s so lovely to see a little girl’s ideas being listened to by a large supermarket. Well done Millie, we are all so proud of you.”

The biscuit was commissioned in November and has now been launched officially launched around the country, priced at £1.50.

Phillippa Bortoli, who works as a bakery buyer at Waitrose, said: “When we received Millie’s letter, we really wanted to help make her wish a reality.

“Particularly as it’s been such a difficult time for lots of children and we thought this would be a lovely way to spread a little kindness.

“Her feedback was really valued and her idea was so playful and fun.

“We are absolutely thrilled to be able to take Millie’s idea on board and create this colourful gingerbread unicorn which we are sure all our other customers will love too.”

Original Biscuit Bakers sales and marketing director Sarah Hopcroft, added: “We were delighted to help develop a unicorn biscuit to make Millie’s dream come true.

“We wanted to name the biscuit after Millie in recognition of her initiative and we are extremely pleased to hear Millie has given the unicorn biscuit 11 out of 10.”