Former pupils at Dulwich College have made shocking claims about the Reform leader’s behaviour at school – which he denies. Daniel Boffey reports Peter Ettedgui is a well-known film-maker. But 40 years ago he was a nervous boy starting out at Dulwich College in South London. “I was 13. I’d come from a fairly small school into this slightly intimidating, kind of gothic structure. That was huge.” He loved performing and soon found his niche in drama, he told Annie Kelly. But one boy shocked him: Nigel Farage. “Once he found out I was Jewish, you know, that was…