Tuc, the answer is much simpler - the Apache has a digital mapping system that is relied on in flight - the problem is that the system has to be populated by the crew, marking wires, masts, airfields, targets etc before flight.
But, there are only 95 bits of info that can be put on that map which restricts you to a specific track if you are to retain accurate obstruction information. Once you deviate off-track you are effectively flying blind, at night with just the IR system to help you.
Of course the FOB mandates that appropriate mapping is carried on the aircraft and that seems to be met by the bloke in the back stuffing a half and quarter mil into his pocket - whether they are actually referred to in flight or not I cannot comment on but anecdotal reports would suggest not.
I suspect the crew involved had very carefully marked the large wires they hit but may have seen the smaller ones and mis-idented those and continued their approach.
Since MAA is all about airworthiness - who signed off a nav/mission planning system with very limited capability for use in UK when a proper, digital database, correctly updated could have been procured? Hardly ALARP is it?