I had exactly the same. They asked how my morning was, I pointed out it was afternoon and they hung up. I came on here to check the number and saw someone say they called the number back and got the voicemail for Dyno Nobel - who I work for. I called the number back and yep - got work's voicemail. They'd spoofed the number for a phishing attempt. You just cannot be too careful!!

The caller claimed to be called a very anglo-saxon name (despite clearly being Indian), sais they were calling from IBM, asked me how my morning was and when I pointed out it was mid afternoon, they promptly hung up on me.

I called back number (07) 3908 1700 reached voice mail for a company called Dyno Nobel.

Answered with no response then they hung up.