This is the bit I can’t fathom.
I’ve been done (quite rightly so ) for doing 43 in a 30.it was a built up area very close to the entrance to a school and I was given 100 quid fine and 3 points but a director at our place has been done doing 65 in a 50 on an empty motorway at 3am. He’s been done for a weeks salary. I just can’t see how he’s been given such a higher penalty for what I personally deem a lesser offence.
The sentencing guidelines have been changed. It's all here:
Speeding (Revised 2017) – Sentencing

Your director received a Band B fine, so he must have been doing between 66 and 75 in the 50 limit.