Diane Abbott’s support for Jeremy Corbyn in doubt over Brexit vote

Shadow home secretary’s office unable to confirm intentions for Brexit negotiations after missing article 50 voteDiane Abbott’s future in the shadow cabinet was in doubt on Saturday night after she failed to guarantee that she would vote to trigger Brexit negotiations in the Commons this week.The shadow home secretary missed a vote last Wednesday, citing a migraine, after Jeremy Corbyn imposed a three-line whip on his MPs to support a government bill to trigger article 50. Corbyn&rsq