Forgive me, but it seems he was driving slowly because there was a huge lorry in front of him...? Also, bit hypocritical seeing as you then proceed to break the speed limit by 7mph.
Incase his insurance providers check in the future and there are negative comments its safe to assume they're false (unless evidence) since he has an internet following.
I nearly got side swiped by this A Hole coming down Bluebell hill - I was going at 70 in the right lane and he undertook me, must have been going a lot faster then weaved in front and slammed on the brakes - thinks he's Iceman from Top Gun with the shades.
Stone me !!! If the moron had nudged you when he was undertaking you he would have sent you in to oncoming traffic. What a d***head.
Surely he can be done for dangerous driving? Have you reported the idiot to the police?