It sounds like you've got an academia background so if they're research or R&D positions, that might be why. Because they're competing in an already saturated field. Or there aren't many jobs but lots of graduates keen to work in your subfield who will do it for lower pay because they enjoy the work.
If you moved into in-demand fields, service delivery or consulting, you'd see 100k GBP as normal for seniors. The fields only require mastering the tools or domain and the ability to work with business stakeholders. That is from my experience, the majority of the software world.
If you moved into in-demand fields, service delivery or consulting, you'd see 100k GBP as normal for seniors. The fields only require mastering the tools or domain and the ability to work with business stakeholders. That is from my experience, the majority of the software world.