Nope.
All part of the game for Mitchell surely: as above, this is just another chapter in his career and there are still plenty of opportunities and doors open to him that are not open to brighter, more capable, more experienced but less well connected people.
As a party/chief whip of any political party, I’d have thought Mitchell should be understanding of:
1) the need to cut off a bad branch for the good of one’s party even if it is the press and the public’s understanding at the time which is at fault, not the individual being instructed to resign.
2) the myriad ways in which one might be stabbed in the back, and the range of people who might be holding the knife.
3) you just don’t start messing with the police’s funding, conditions and pensions! Has he not seen The Shadow Line? 😆
Also the man is reputed to be a proper bullying nasty piece of work, even for a party whip. The political party he happens to represent comes a long way down the list for me.