I reckon the orange cables are MICC 2 core.
Thinking about the new colours looking odd, tails are usually double insulated with the outer pvc being grey. I suspect that these blue and browns might be the individual cores from the armoured cable. Having said that, I have never seem armoured cable with 2 browns and a blue so they could be jointed in that trunking to the left but they still look like single insulated singles.
I have never seen a meter set up like that before, it all looks a little odd....
