WheelsofCardiff:
Depends on how many hours you are driving before or after. My old mob used to hire a minibus to take us to the training centre. Anyone with a bus entitlement would drive it and back. We used to get paid 10 hours for the cpc course
That would be 2 hours, 1 hour smoke break, 90 minutes, 1hr meal break, 2 hours, 90 minute smokes break, 1 hour - finish in time for a latter-day runout somewhere… 
