Ambulance staff in the West Midlands are being balloted over potential strike action.

Members of the union UNISON are voting on whether to join a nationwide day of action, on 30 November, over pension changes.

Ravi Subramanian, Regional Secretary for UNISON, said it was the biggest ballot in the trade union's history.

Join UNISON online today Agenda for Change - the NHS staff council working in partnership Equality in UNISON, find our more