(By jointly operated, I mean two bus operators within the national bus company). Last week, I spoke with a guy who said that up until 1990, he was a bus driver for EYMS and can remember the pre-deregulation days. He often did the jointly run 350 route which similar to how it is jointly run by Stagecoach and EYMS now, was jointly run by Lincolnshire and EYMS. He told me that if ever a bus he was driving on the 350 route broke down, if it was on the south side of the Humber, Lincolnshire would send out another bus he would then drive even though he was an EYMS driver. Was this sort of thing a common occurrence pre-deregulation where in such situations such as breakdowns, drivers would sometimes end up driving other companie's buses as long as those companies were under the NBC group?