Duty of care really. If you have flown back to the UK, you have been on Duty all that time. You were probably up early, waiting around in less than relaxing facilities, flown home and then step out of the terminal at Brize. I'm guessing you would be breaking drivers hours by quite some margin. Your unit should be moving you and taking proper care of you. Anything less is illegal.
Perhaps the titty-merchants want to get outraged about this too
