(25 Jul 2017, 5:38 pm)omnicity4659 wrote Speedo apps are regularly off, I recommend sitting at the front and spying on the cab speedo

The one I use is usually within 1-2mph of what the speed is according to a speedometer. The fact we slowed down quite considerably for the 50mph section makes me think the app was correct. 

Must be said, however, I had 7524 out of Newcastle earlier, and it was quicker off the mark than any of the MMCs I've had.