Come on, did you seriously think that email was from Natwest? The website link is just comical - nwolb.com 
That's how Natwest comes up when you log in to it as you can see from my screenshot
I never read any emails etc from the bank. If they want to tell me something important they will either write to me or ring me. If they ring me and i'm suspicious i ask for their name and tell them i will call them back.
