China says it was ‘a mistake’ for British Foreign Secretary Dominic Raab to call Hong Kong leader Carrie Lam

• Beijing describes conversation as move to ‘exert pressure’ on city’s chief executive and tells Britain to ‘stop intervening in China’s internal affairs’
• Raab had called on Lam to start an independent investigation into recent events ‘as a way to build trust’ – something she has so far refused to do