Wow!
What a difference the new wire colours make to an installation.
It looks like someone stripped a flex and used the conductors to wire this up.
Are them Orange cables a two core arrangement that come out of them fuse-holders, as in phase and neutral?
Personally I would have put some sort of protection over them wires, even though they are double insulated.
That earth block on the right hand meter couldn't be any more crooked.
Just a note about cable tray, I have some mis-givings about using it with softer cables like these, the edges on the tray can be razor-sharp and have been known to cut the sheathing on cables with vibration/building movement, I've used lengths of heavy PVC insulation over the edge of the tray where the cables exit or enter the tray.
They can also give you a really nasty cut, if you don't watch what you're doing.
