Watch the Glenn and K.K. online guitar lesson by Angus Clark from Focus On: British Metal
The rhythm parts here are challenging just in the metronomic precision and lock-step vibe you need to have to keep it together when your are playing just over the hi hat. Make sure you're getting it done cleanly and evenly.
The fast parts of the solo are great examples of how players in this style are taking a guitaristic approach to adding scalar material into their solos. It's as much about playing ergonomic shapes as it is about playing the right notes. My favorite thing in the solo is the chromatic bit at the end - have fun with that!