: A legitimate bank representative will never ask for your full PIN or password over the phone. Alternative Contact Options
For those with hearing or speech impairments, the Relay UK service is available at 18001 0370 333 9091 . Scam Warnings: Is the Call Safe?
Help with due bills, interest rates, and repayment issues. Service Availability and Costs
However, assuming this is a communication identifier, here is a useful template for a professional follow-up email regarding a missed call or inquiry from this number.
Are you trying to resolve a with a NatWest card, or did you receive a suspicious call you'd like to verify?