Aviva, the insurance group, which owns 0.8% of Mitchells & Butlers (M&B), has said it will be supporting the board at today’s annual meeting showdown with rebel investors led by Joe Lewis’s Piedmont investment vehicle. Aviva has criticised Piedmont and its associates for persisting in “trying to exert their control over the composition of the board”. M&B chairman Simon Laffin is at risk of being voted off the pub group’s board at today’s meeting.