There used to be public lists from various sources Neil, definately on actionfraud.
Reporting these is more hassle than its worth though action fraud will check in to it and contact you. Most they will do is acknowledge and monitor adding that number to the growing list.
When they contact you they might transfer the details to another gov agency who in turn may repeat the same again. End result cant do a thing about it.
Last one i reported was from a local co in Bilston tracked them down. In short blocked 14 numbers they rang from all forwarded with times and dates to Action Fraud. Waste of 1hr compiling they did nothing depite me almost having a heart attack giving them some. Looked at 7 calls a day 3 days a week for many months, phone could only block 20.
Theres scammers who try and flog you call blockers, some might even send you a cheap call blocker. End result the only people that are authorised are the TPS, register with them.
If on TPS its illegal for any legit business to contact you, so if they do you know theyre up to no good.
Scams get loads daily seen em all, by email and phone been going on for last 18 years.
If answer phone and dont recognise the number or with held, first thing "What you selling" now if its someone ie a customer i have to apologise, if not they get it full on or if cant be arsed put phone down.
Silent calls are to see if its an active number, if it is when you pick up the datas sold on and continually sold on. In the past when was with TT for a brief period – paid to get away 1 scam a day turned in to 7 within a week continually multiplying so get 28 by the end of the month.
Funny one two weeks ago had an email from myself wanting me to click on something. They changed the headers, beware.
Seen it thousands of times from so called banks or reputable businesses but they usuall create another name in front or the real one.