Christian Horner: ‘Not all teams act that way. You don’t see the same brutality as when I left’

Christian Horner says he is still in the dark about his Red Bull departure: ‘I wasn’t really given a reason.’ Photograph: Tom Jenkins/The Guardian

Christian Horner should be in steamy Singapore, preparing for another grand prix victory, but here he is, at home on an autumnal morning in genteel Highgate as his wife, Geri Halliwell-Horner, welcomes me with a cheerful hug. Horner smiles as the former Spice Girl produces an impressive imitation of my South African accent which echoes her old headteacher at Watford Girls.

After the most controversial man in the recent history of Formula One says hello, Halliwell-Horner and I discuss the fact that my two daughters also went to her school and that one of their history textbooks had her name printed on the inside page – while the ex-Ginger Spice talks about gritty old Watford, grammar school education and Nelson Mandela.