Union, to which deputy PM may not belong, also votes to reconsider ties with Labour if council forces through redundancies

• UK politics live – latest updates

Unite has voted to suspend the membership of the deputy prime minister, Angela Rayner, and reconsider its ties with Labour over their approach to the Birmingham bin workers’ strike.

Labour’s biggest union donor passed the motion at its policy conference on Friday, despite party sources saying Rayner had resigned her membership of Unite months ago.