In your last pic, that is an ABS (Air Break Switch.
There is no fusing in these bits of gear they are just a switch, as I am sure you are aware.
Just a note on the cable head, to the right of the ABS, where the 11kV heads underground.
Over here in NZ, we would have to have an XLPE cable taken up to the level of the cable-head there and sealed with a Heavy Duty Heatshrink Boot and sleeves with Arc flash preventing cowlings on each Phase.
And where a feed heads Underground or returns to terminate at a pole, the wires must be sleeved with Heatshrink to denote the Phase Rotation of the 11kV supply.
Don't get me wrong Paul, I'm not having a go at you or your Line-workers, in the UK.
Line-work is hard enough to do, without some idiot poking jibes at you!.