Two lesbian friends at a school in Milton Keynes will arrive at their prom in proud style tonight in a rainbow bus.

Amy Stimpson and her friend Topaz Sattaur are Year 11 students at Shenley Brook End, while Amy also runs a support group for LGBT young people.

They will be attending their prom tonight in a ‘carriage to the ball’ with a difference – the Rainbow bus, which has been described as the “biggest, gayest bus in the world”.

The vehicle is sponsored by local nightclub Pink Punters and is used for community events. It was recently used to promote an LGBT History Month event at the British Museum.

The girls were due to have their photos taken with the bus this afternoon at Bletchley Park, where gay mathematician Alan Turing worked on cracking Nazi codes.

Amy, who helps out at local support group Q:alliance, explained how the idea came about: “Prom was coming up and I didn’t like the idea of a limo and wanted to do something meaningful. I hope this inspires other teenagers to do the same in their schools.”

Topaz added: “I’m really glad the school is happy for Rainbow to take us to our prom. It’s an amazing opportunity I’ll remember all my life. Everyone is so supportive, it’s great.”

The pair were inspired to do something different after hearing about Constance McMillen, the American student who challenged her school’s ban on gay couples attending prom.

Tony Fenwick, co-chair of gay education charity Schools Out, praised the girls and their school.

He said: “It’s wonderful to see such a positive story for a change. Amy and Topaz are an inspiration to us all, and hats off to their school for supporting them.

“I look forward to the day when same-sex couples in every school feel safe and supported enough to go to their prom with pride.”