andysafc24
Winger
The OP's McNamara example is a good one. I heard when he was at Dundee United "talented young manager."
He went to York, bloody York and failed miserably
There has been lots more. On the reverse side people like terry Butcher and Neil Lennon flopped down here and were fairly successful in Scotland. Butcher failed in England went to Inverness and Hibs and was generally successful. His two jobs in England at Brentford and Exeter were short lived disasters.