Definitely a recognized scammer with substantial history. Do not pick up because that verifies your phone number is active then they will call back every day for ever.

left no message

I answered with "thank you for your call, it is important to you....." and they hung up.
Likely scammer as I've received other calls from numbers startin 02912827..!

No message left when I didn't pick up.

Rings often - no message left