Same thing happened with my friend down Country. Her ex’s infamy went before him - local solicitors wouldn’t touch their divorce with a barge pole! They ended up using London based law firms which cost a lot of money, but a family business and millions were at stake. She’d kept records of his dealings and said she’d be prepared to go to prison, should she be forced to reveal them.
To think that London, or anywhere else for that matter, does not belong to any one demographic