Uh-huh. There are zero -- sorry, nil -- Delphi jobs on jobserve in the UK. That is one of the leading job sites in the UK. Zero. There are 282 jobs with python in the job description.
The world is a much bigger place than only the UK. Delphi usage was and is not only about a single location. And, a Delphi/Object Pascal programmer can work remotely, know other languages too, or be a freelancer.