By City A.M. Reporter Keir Starmer’s first Cabinet is the most diverse on record in terms of education background, analysis has shown. The majority of the Prime Minister’s top team – 23 Cabinet ministers, or 92 per cent of the total – attended comprehensive schools, according to research by social mobility charity the Sutton Trust. The Prime Minister attended a grammar school which was a state selective grammar when he started, and his place remained state funded throughout his secondary education even though the school became independent two years into his time there, according to the charity…