What do you mean? The underworld rig with all his equipment? That wasn't visible on the Glasto stage, as far as I could see. You're better off just checking the Dallas videos on youtube from the 360 tour.
It was all on stage, and visible all day, with Dallas working away during all the other bands sets. During U2 they had one of the video screens in front of it.
The rack and amps were on-stage for Glastonbury. But they were in farther back and not in the light so much. So the rack can not be seen very well in most of the clips and pictures I've seen.
I haven't seen any great pictures of the rack or amps from Glastonbury. You can peruse the clips on YouTube and otherwise and make screen-captures.
It was all on stage, and visible all day, with Dallas working away during all the other bands sets. During U2 they had one of the video screens in front of it.