Experts are urging drivers to prepare themselves and expect delays on the M25 in the near future as 150 maintenance workers announce strike action over pay, affecting some of the busiest travel routes. The workers operate from depots based at Barnet, Uxbridge, Swanley, Epping and Dartford with strike action predicted to cause serious disruption to journey times. The Unite union workers provide maintenance for the entire M25 including the upkeep of 117km stretch of road. Through Balfour subsidiary, Connect Plus Services, the workers are responsible for operating and maintaining the M25 network,…