However there are large industries in the UK that will offer a solid job, the ones that spring to mind are academia and the charity sector. These industries aren't the top paying, and that's exactly why these jobs aren't being fought over. Additionally as you'll not come into direct contact with vulnerable people or children, DBS checks are unlikely to apply and the sector based restrictions like those in the financial industry are not present.
The work in these industries also isn't the most challenging for coding, the challenge is typically it not being funded well enough and having to find cheap and pragmatic solutions you can maintain. In the charitable sector you really need to know Drupal and PHP... and then a mix of how to glue things together, run IT systems, etc. In academia it can be a real mix of work, from IT services, through to website and email services, all the way up to "PhD student knows what they want to run on a supercomputer but doesn't know how to get it to run efficiently on this (slightly older) supercomputer".