The Metropolitan Police Federation, which represents more than 31,000 rank-and-file police officers, said it has “no faith” in London Mayor Sadiq Khan after he ousted Dame Cressida Dick as head of the force last week. Dick resigned as Met commissioner on Feb. 10, saying she had lost the backing of Khan, who left her “no choice but to step aside.” The federation said comments made by the mayor have “undermined the professional, dedicated, and incredibly difficult work of tens of thousands of hard-working and brave police officers from across the capital.” Ken Marsh, chairman of the federation, accused politicians of using “policing and the career of the country’s most senior police leader to deflect from their own failings. “We have let the mayor’s office know in no uncertain terms how our brave and diligent colleagues deserve better,” he said. Marsh said the atmosphere in the force is “horrendous” and “rock …