Nigel Farage speaks at the Conservative Political Action Conference

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The situation was underlined last week when Welsh teaching assistant Sion Rickard told the Labour conference in Liverpool that if children got a “proper education”, the country “won’t have any Tories”. He received rapturous applause. Afterwards, Tory and Ukip politicians revealed their children had been bullied. One MP said: “My young son was introduced to his class as the child of a Conservative MP by his teacher, who went on to tell his classmates not to speak to him.

“The headteacher apologised but the damage was done.” A former Ukip activist recalled his son was given detention for questioning his teacher’s political views. He said: “My son’s teacher said the Right-wing do dreadful things while the Left-wing takes people’s money and do nice things with it. “My son put his hand up and asked, ‘What happens when you run out of other people’s money?’ The teacher paused for 10 seconds and gave him a detention.” He gave another example from a history class at the same south London comprehensive: “It was supposed to be a double lesson about the Vikings and Saxons, but little history was taught.

Labour is concerned that free schools and academies have too much autonomy and aren’t subject to enough political control Toby Young

“Within five minutes it turned into a lesson of ‘We’re all migrants, migration is a very good thing’. She then put a picture of Nigel Farage on the board, used the word “Brexs***” and said ‘Those who oppose migrants like this man are liars’. “She turned to the class which is particularly ethnically diverse and said, ‘This man’s father wants to deport you all. Don’t speak to him’.” He added: “As you can imagine, it’s been traumatic for my son, though he has found ways to make friends again.” Last year Tory MP Bob Stewart revealed his four children had all been bullied at their schools in Beckenham, south-east London: “Such behaviour is taken to a new level when, during the last election, a teacher tells the class of my 13-year-old boy that nobody should talk to him because he is the son of a Conservative MP.”

It has strengthened calls for more free schools to stop youngsters being drip-fed socialist views