Dawn Butler says Boris Johnson's failure to condemn 'racist' adviser is a 'test'

EXCLUSIVE In an interview with the Mirror Dawn Butler warns that Boris Johnson is trying to see what the public "find acceptable" in quite a sinister way by refusing to sack Andrew Sabisky. The former minister talks about serving in Tony Blair's government, how she's sick of being patronised as a black woman and why she's not surprised she polled so well with the public