I have seen Priest many many times with Halford and Ripper, technically I actually think Ripper has a better voice and is a better showman/frontman.
The biggest laugh I have had in recent weeks was seeing the ad for the DVD and CD and I quote for "the legendary Judas Priest show at Brixton Academy". Now call me old fashioned if you like but I have in my mind a legendary show would be a gig that was sold out and people hanging off the balcony, creating a frenzied atmosphere! Not as was, a gig with less than 1000 people in a venue that holds upwards of 3000, the balcony wasn't open, downstairs was nowhere near full. And the atmosphere during Priest was reminisent of an adequate covers band going through the motions in a pub.
This is in no way a dig at Priest who are genuine rock/metal legends, but as I understand it Saxon where added to the bill in the hope of increasing ticket sales.
As for Saxon's performance (I admit I am biased), yeah the Priest crew where testing the lights during their set but it didn't interfere in any way with Saxon's performance and the atmosphere and crowd reaction during Saxon's set was 10 times the reaction Priest created.
Seeing the lights being tested reminded me of Bon Jovi buzzing Donington in a helicopter during Metallica's set in 1987, and quite frankly bearing in mind Priest gave Saxon the gig in the hope of increasing ticket sales you would have thought they would have showed a little more respect.
Anyway rant over, thank you for bearing with me.