Thanks for that Andy. In the 53 years I've been bus driving, it's the first time i've been nicked fr speeding in a bus.
On the A22 going out of East Grinstead the road is uphill, then dips slightly. With a full load of passengers, with it tipping down with rain,force 8 gale, the camera is about 100m beyond the brow of the hill. My time was better spent trying to see where the road was than looking at the speedometer. It was also close to midnight and there's some awful pot holes to dodge. 2 buses on that service blew out tyres on pot holes that day. I drive about 40,000 miles a year! Not to worry.