[joglynne]

I use one of these. Banging down on the big red button is very satisfying.

https://www.cprcallblocker.com/

It works with any home phone that has caller display and I can block numbers either by hitting the red button on the machine or by using a code sequence via which ever cordless extension phone I use. Just getting very fed up at the moment with the spam calls that come showing a legitimate UK area code.