That riff.... 

1952 Vincent Black Lightning by Richard Thompson

https://drive.google.com/open?id=0B2bpt7TAqsI6X003eFI0TGExZVk

GuitarPro https://drive.google.com/open?id=0B2bpt7TAqsI6UVo1aUZvbFg1V1U

http://guitarmortal.blogspot.co.uk/2014/08/guitar-gods-richard-thompson.html