Freelance complaints handlers are a quietly substantial contractor market – remediation programmes, FOS-caseload surges, Consumer Duty projects – and the work is unusual among office trades: you make decisions about other people's grievances inside regulated processes, where a mishandled case can mean compensation, regulatory findings, or both.
Get the £1m PI certificate before the agency asks, add cyber because the job is sensitive data, and keep cover continuous between programmes – remediation claims trail their programmes by years. Then work the way the insurance assumes: decisions documented, calculations checkable, files handled like the regulated material they are.