Chelsea torment Strasbourg, another messy Celtic divorce, and aimless Man United | The UK coaching carousel

We're back from winter holidays to talk about the wild coaching carousel January has brought us – particularly in the UK.

Our main story is Chelsea, who parted with Enzo Maresca and replaced him with Strasbourg's Liam Rosenior. But was he ever really Strasbourg's? We discuss Chelsea's treatment of the proud French club as a minor league feeder team and why UEFA refuses to enforce its own rules. We also speculate on Rosenior's success at the Bridge. Can he make it longer than Maresca? Is he too corny to relate to players?

Next, we address other Any Given Thursday alumni struggling for direction in Britain – Manchester United is out a manager yet again, and we spend some time admonishing their business practices, as well as Spurs' and West Ham's. Are these badly-run clubs making the Premier League less watchable?

We then turn to Glasgow, where Celtic cut ties with Wilfried Nancy after a catastrophic 33 days in charge. We debate what went wrong for Nancy, where Celtic go from here, and why clubs continue to make the same mistakes in their coaching hires.

Finally, we move to the continent, where we comment on floundering Mainz welcoming new manager Urs Fischer to the fold. Can he save them from the German Conference League curse and relegation?

All that and a bit of transfer business from Italy and Portugal.

Cheers to Ron Jans!