A deputy London mayor accused of attempting to "squash dissent" over the ultra low emission zone (Ulez) scheme has pulled out of a planned media appearance.Shirley Rodrigues was replaced by another deputy mayor, Seb Dance, to answer journalists' questions at the Greater London Authority office in Southwark, south London, on Monday.

A deputy London mayor accused of attempting to "squash dissent" over the ultra low emission zone (Ulez) scheme has pulled out of a planned media appearance.Shirley Rodrigues was replaced by another deputy mayor, Seb Dance, to answer journalists' questions at the Greater London Authority office in Southwark, south London, on Monday.