Yeah I was also surprised Catherine Wheel didn't make this article. I consider their album Adam & Eve to be the pinnacle of shoegaze. Ferment and Chrome are also prime examples of the movement. Maybe they weren't included because they were a bit harder to interview? From what Rob has said recently, I would be surprised if they have a reunion tour. They seem to have mostly moved on to other things.
They weren't really part of "the scene", maybe because they hailed from Great Yarmouth, which (without wanting to offend anybody) is not exactly the hippest part of the UK. Also I think they appeared a bit later (could be wrong about that).
Being my first and favorite shoegaze band, I discovered Slowdive, Dinosaur Jr., My Bloody Valentine and others through The Catherine Wheel.