one of the prime minister s longest serving members of staff, munira mirza, has quit downing street over borisjohnson sjimmy savile attack on keir starmer. and northern ireland s minister resigns in a protest over brexit arrangements. and curling kicks off the winter olympics in beijing. and coming up in sportsday later in the hour on the bbc news channel, there s more misery for england s cricketers the women, just ike the men, failing to regain the ashes from australia. good evening and welcome to the bbc news at six. the cost of living crisis