I don't know who they are - they have been ringing for days and when I try and call back it is always unavailable

They called today, I answered 'Hello" they said "can you hear me?" I hung up as I assume they were after a sound recording of my voice saying "Yes" for fraud purposes - I have heard of this before so thought I would share as a warning!

I don’t pick up. They called at dinner time. They don’t leave a message. I blocked the number.

No missed call, but got a message that I missed a call, but no message was left. Not going to call back.

It appeared as suspected scam on my screen. I presume, just another scam :(

Caller: Kantar market research call centre

called back, got a voice message that no one available to take my call.