You know what, I hope these guys get away with it from time to time - might sound like a bizarre attitude - especially as my best mate had his card details swiped from a dodgy cashpoint and lost hundreds (though the bank gave it back)
I get hundreds of these things, almost daily i get natwest, RBS, HBOS, Abbey (is a particular favourite of the hackers) but i've even had tesco ones too and a few more obscure ones
I have contacted the banks, forwarded the emails to the police, even contacted my mail provider to get them to improve their filtering for these messages
Not one bank or the police have replied to my emails warning them of this attempted fraud.
So, good luck to them - and the sons of deposed Nigerian kings with £50,000,000,000 in the bank