A schoolgirl who was put into isolation and pulled from lessons after wearing a Union Flag dress to mark her British heritage on school culture day has been backed by the Prime Minister. Courtney Wright, 12, a straight-A student, turned up to class in a Spice Girls-style dress and wrote a piece about British history and traditions to mark the occasions. However, teachers branded her outfit "unacceptable" and she was thrown out of lessons at Bilton School in Rugby, Warwickshire, reports the Mirror. She was then forced to sit in reception until her dad could collect her. Furious dad, Stuart Field, 47, said he was shocked when he found his daughter had been segregated from her friends due to her choice of attire. In a permission letter sent to parents , it said the day was "designed to promote inclusion, understanding, and appreciation of different backgrounds, traditions and heritages". The decision to punish her caused fury and PM Keir Starmer's spokesperson appeared to side with the schoolgirl and her family. They said: “I think the school has put out a statement on this so I’m not going to comment further, but the Prime Minister has always been clear that being British is something to be celebrated.” Courtney's dad Stuart hit out at the school's hypocrisy and claimed other pupils with St George's flags and Welsh flags were also turned away from the school gates. He said: "Courtney was so embarrassed and couldn’t understand what she’d done wrong. It’s the school who have made it political and it went against everything the event was being held for. She chose the dress and wrote the piece off her own back. "They day was to celebrate everyone's cultures and Courtney chose this Union Flag dress so she could celebrate hers. She also wrote this speech to go with it and was very proud of what she'd done. The next thing I get a call at work at around 9am to say she's not allowed in school dressed like that and that it was unacceptable. "I wasn't able to get away from work until about midday. They made her sit in reception all morning in front of the receptionists and kept her in isolation. She should not be made to feel embarrassed about being British. And she shouldn't be punished for celebrating being British - nobody else I've spoken to can quite get their heads around it. "Somebody at the school has politicised a Union Jack dress even though that was clearly not Courtney's intent. Courtney didn’t do anything to be political. It's about being British, the Spice Girls and even the freedom at being able to wear a dress. This is just what being British means to her." The school has since backtracked and apologised after a weekend of backlash. A spokesman for Stowe Valley Trust said: "At Bilton School , we are proud of the diversity of our students and the rich heritage they bring to our community. We are committed to fostering an environment where every pupil feels respected, valued, and included. "On Friday 11th July, an incident occurred during our Culture Celebration Day that caused considerable upset to one of our pupils , her family, and members of the wider community. We deeply regret the distress this has caused and offer our sincere and unreserved apologies. "We have since spoken directly with the pupil and her family to listen to their concerns and reflect on how this could have been handled better. We are committed to learning from this experience and ensuring that every student feels recognised and supported when expressing pride in their heritage. "As a school , we are reviewing our policies and strengthening staff training to ensure our practices reflect our values of inclusion, respect, and understanding for all.”