Thanks. I've been using these sites as well to watch the trends:
https://www.itjobswatch.co.uk/jobs/uk/senior%20software%20en...
https://www.itjobswatch.co.uk/jobs/uk/senior%20software%20en...
A tangent but I'm curious due to the language on this site: Is SWEng generally considered part of "IT" in the UK? Here in the states it seems most orgs consider IT strictly infra and "Dev"/"Engineering" is a separate thing. Some do place it within IT, but in my (limited) experience those orgs which do tend to have a running conflict with SWE fighting to get out of IT because of onerous policies which were perceived as not well-suited to their workflow.