Re: White pylon@ John Brown (no body)
"It does make one wonder why they don't just build on MoD land. "
This was looked at when they were considering plans to build new nuclear, as you say it would be sensible. But even more sensible to build next retiring nuclear plant (eg Wylfa, Oldbury, Bradwell) because these have some form of grid export capability and so don't require new power lines to the same extent, and the local communities generally accept nuclear power as safe.
So with the limited level of ambition for new UK nuclear there wasn't really the need to use old military land.