What does my main character's rich husband do in London?

[rosewool]

Other than a banker or a politician ?

Actuary
Lawyer
Entrepreneur

Ship broker

Media type
Advertising bod
Harley Street medic

Hmm, how old is he and is it a job that he has to keep terribly busy with or is he just frightfully wealthy?

Partner in a law firm or consultancy.
Tech entrepreneur.

Art dealer

Tech CEO

Partner in a law firm or accountancy firm

Cool or traditional?

Commissioning for TV

Art director or media account handler

Music producer

Celebrity chef to the stars ..

Plastic surgeon

Owns a recruitment consultancy (I know two guys who have started out bottom rung in recruitment and now own their own agencies and are very wealthy)

Ship broker
And how. Friend-of-a-friend does this. He's beyond loaded and is only late 20s. Incredible bunce. He's very good at it, obviously.

Also

Tech start-up (only works if he's under 45 I'd say)
Barrister (the wealthiest person I know is a barrister)
Partner at one of the Big 4 management consultancies
Old money or family money
Surgeon or private dentist

He designed an app and made shed loads of money... Now spends his time trying to repeat his success.

Property developer?

Politicians aren’t rich like bankers through politics! An MP’s salary is just under £80k. The rich ones (which is by no means all) are rich because of inherited wealth/a previous lucrative profession/having a second/3rd/4th job outside politics etc.

How about management consultant?

Football agent

Pension fund manager

Insolvency practitioner

Son of a man who wrote a very famous Christmas song, and now lives off the royalties?

Richest person I have met - hedge fund

Something really vague and boring to do with moving money around - pension fund management maybe.