I'm on the run...
Just had a call from "HMRC" explaining that I owe them Tax, and if I didn't immediately "Press 1" on the keypad then they would initiate the issue of a Warrant for my immediate arrest
These type of calls seem to come in waves, the calling number looks genuine but is spoofed. I usually glance at the caller display and only pick up on the "Withheld" number if I've a Hospital appointment due in the following week as the Hospital have an automated reminder system that requires interaction.