The ones that came to mind immediately were the ones along the A494 here and here, which are as you describe, though the latter exhibits some pretty poor design elements.
This one is an oddity, being a uni-directional crossing (the opposite direction uses regular RAGs and high level PBUs as the horses would be on the carriageway on that approach) and also in a particularly urban area. There's this regular pegasus crossing not far a way, too, also exhibiting an unusual backdrop. And to complete the set, there's these (one and two) Pegacans (Pegasus + Toucan, no? ) as part of the same bridleway network (I think).
There's also this (terrible photography aside) LED one using old-school full LED arrays, which must be pretty rare. I can't for the life of me remember where it was other than it was in West Yorkshire somewhere, probably heading towards Harrogate. I wouldn't be surprised if it's been replaced by now. Edit: it was here, and yes, it's been replaced.
What must be rare now are Equestrian crossings fitted with Mellors...
Good old Forest City signal heads.
As we've discussed not too long ago, they're fairly difficult to date because they've been in production for so long without any real altering of the design and they don't age very well. Interesting one being a sole signal head per approach as well.
Given the installation and signal type, presumably this is a private road and the signals are privately maintained?