It's still happening!
Today I had a call from a John Gabriel at 02031290910 claiming to be from TalkTalk and then Open Reach trying to get me to install Teamviewer. He knew my name, address, postcode, account number at Talktalk. When I refused he got angry and said I was wasting his time. I put the phone down and reported it to Talktalk.
Talktalk previously specifically stated that my details had not been hacked. How did this guy get them then?
It is worrying.