Ambulance workers in England took to the picket lines again on Friday in a long-running dispute over pay and staffing, with no sign of a breakthrough in the increasingly bitter row.About 15,000 members of Unison in five areas walked out, with officials warning of escalating action in the coming weeks unless the deadlock is broken.Unison is balloting another 10,000 of its ambulance members in England for industrial action so any future strikes could be the biggest yet for the union.

Ambulance workers in England took to the picket lines again on Friday in a long-running dispute over pay and staffing, with no sign of a breakthrough in the increasingly bitter row.About 15,000 members of Unison in five areas walked out, with officials warning of escalating action in the coming weeks unless the deadlock is broken.Unison is balloting another 10,000 of its ambulance members in England for industrial action so any future strikes could be the biggest yet for the union.