With its manicured lawns and gently swaying palms, Harvard-Westlake is the school of choice for the children of Hollywood's elite. Lily Collins, the actress daughter of Phil Collins, went there, as did Lily Sheen, the daughter of actors Kate Beckinsale and Michael Sheen. Steven Spielberg, Tom Hanks, Denzel Washington and Cybill Shepherd also sent their children to 'HW', as the school is affectionately known. But in recent months, the £31,000-a-year institution has become a hotbed of controversy – the centre of what one parent, the mother of a teenage boy, described as 'wokeness gone mad'. For in the months since the death of George Floyd sparked protests across America, HW has introduced a Diversity, Equality and Inclusion (DEI) programme so strident that it has left many parents outraged.