As a matter of interest, what are the legal limits on driving time?
The legal limits date back to the 1988 Clapham Rail Crash and are known as 'Hidden'
This basically gives a maximum time on duty of 12 hours with a minimum rest between duties of 12 hours.
Within this each company has agreements on the amount of time spent driving and the length of breaks but are based around the Working Time Agreement.
At
LTV▸ we have a daily maximum driving time of 8^ hours a day with max 5 hours continuous without any break or turnaround time of between 14 to 30 mins.
The length of the break depends on the time actually on duty and ranges from nothing for a turn under 7 hrs to 45 mins for a turn between 9 to 10 hours.
HSS▸ and Wessex have a different set of agreements.
Southern have a daily max of 8 hours and their max non stop driving is only 3 hours.
Their brakes range from 20 mins for turns under 6 hours to between 30 to 40 mins for turns upto 9^ hours.
Most drivers will normally work the train to its destination in times of disruption before taking any break that they require unless they are approaching the 12 hour rule which is only exceeded in the most extreme cases and needs the authority of a senior manager.