From the TUC

The Union Advent: 6 Dec

06 Dec 2009, By

Drawing on Health and Safety Executive research, BERR estimated that 161,000 to 241,000 fewer working days were lost because of accidents at work due to the presence of union safety reps.

They estimated the potential range of benefits in this instance from £136m to £371m. DTI also estimated that 125,000-375,000 fewer working days were lost due to work related ill-health because of the work of union
safety reps with a potential range of benefits of £45m to £207m.