To add to this pedal array his modern amp setup is two Marshall Vintage Modern 2466 heads. One audience member who had heard him a few months ago described.. "He had 2 sets of stacks (Marshall), 1 on each side of the stage. When he played it was a really earie.. It was like the sound totally enveloped you. You have to be there to appreciate it"
Trower's a great guy to explain this stuff, his south London accent and straight talk explains simply with a light touch, and unlike some other guitarists he doesn't hide any of the techniques he uses from the viewer.
At last someone has had the good sense to capture this for future players.
It's a short video at about 2 minutes but it does explain a lot.