> I guess I'll never get a job coding due to ageism

I wouldn't assume that. Demand for coders with experience is through the roof at the moment, and from what I can tell the ageism issue is less severe in the UK than it is in the US.

I can see your conviction being an issue for data science jobs as such a job inherently requires trusting you to have access to the data. But perhaps you could find a job that's working on public datasets? Perhaps it would be worth considering trying to find a government / civil service job? They will have lots of public data, and probably have good non-discrimination policies too.