Update:
Friend managed to get out. Handed in notice politely, ensured that all work was finished or handed over by the end of the day, and then toddled off into the sunset.
He’s just had his final pay (no payslip as yet) – has been underpaid by a four figure sum.
Employer currently has 3 or 4 employment tribunals active against them from current and previous employees, so presumably this is the route that he’s expecting my friend to go down. Reading the citizen’s advice page it would seem that employment tribunals are a complete waste of time as more than half of all successful cases are never paid in full anyway.
Any tips? Friend can’t afford to just let it slide, he’s got too many bills to pay… But also has no wish to drag out his contact with previous employer.
Oh, and happy new year (from myself and my friend)