A timely warning and good advice to be careful. I never trust s.m.s. and phone calls, except from numbers in my phone's contacts, mobile and landline.
I suspect the scammers just pick providers etc. at random, eg. banks, broadband/landline providers, energy suppliers, HMRC to name just some.
It's possibly the fact you are a PN customer is them getting lucky and any customer who falls for it, very unlucky.
