Next scam caller gets the "what are you wearing" one.
Then the next after that gets the "concussed" treatment..
The one that worked well for me,in that it got one if my numbers removed from lots of lists was telling the persons supervisor that the number they had called was a national chemical incident hotline and that they were causing absolute panic every time they rang it and that if it didn't stop,Ofcom/serious fraud office would be informed and that they would be prosecuted with costs and compensation claims s well,that particular mobile number was very quiet for two years after a few weeks...