The reason for it was the tyres for service buses were designed for use up to a constant 50mph. Coaches had higher rated ones so could cruise at 70mph, if the roads were suitable, and so any damage/injury caused by a blow out above 50mph would invalidate the bus insurance. It doesn't mean they were dangerous at 52mph, but if you drove a bus down to London on a dual carriageway at a higher cruising speed the tyres would heat up beyond the design capabilities. To prevent this happening ECOC used to limit ALL their buses to 50mph on the governors, which I can assure you was a real pain on long journeys like the Lowestoft to Glasgow. Ambling up the A1 at night with all the other coaches flying past for hours on end could be frustrating!
|Swift PEX170K in Whapload Road, Lowestoft in August 1985 Copyright SYD EADE|
One regular exception to this was the when the Birds Eye factory in Great Yarmouth closed and many staff were re-located to work at Lowestoft instead. A contract to ferry workers was won by Great Yarmouth Transport and for some years the Swifts became a regular sight in the Suffolk town at shift change times. I have a photo of Willowbrook no 70 PEX170K returning home with the 6am-2pm shift in August 1985'
Thank you Syd for your contribution