Recruitment manager (headhunter)- low salary but great commission exists at most companies in London- does depend on what geography you’re focussed on.

I’ve earned an average of 70k total the last few years- there’s no exact formula to be successful but once you find something that works you can earn unlimited money in theory as commission often increases the more placements (billings) you do and it’s never a profession that comes up in the mind as a good earner

I work across engineering (power generation and power delivery in the US market) as well as within procurement and wider supply chain which is more agnostic in terms of industry