A teacher who became the face of a Government recruitment drive has warned that children are being subjected to “left wing brainwashing” in the classroom.

Calvin Robinson, who appears promotional videos and posters for the Department for Education’s “I Chose to Teach” campaign, has hit out at his fellow teachers for politicising their students.

The head of computer science at St Mary’s and St John’s School in Hendon, north London, said pupils are being “indoctrinated to a left wing mentality” and encouraged to see the Conservative party as “evil”.

Mr Robinson, who is the youth officer for the Hampstead and Kilburn Conservative group, said that schools cannot “have their cake and eat it”.