True, loggerhead. I thought the planned lines were more of a problem for the soaring area to the South, and you are right, it adds risks for returns, which may put a whole, good, soaring zone out of use.
There are already power lines quite near Easterton to the South, close enough to constrain, or at least require care, for tug operations because of trailing tow ropes.
It should be possible for SSE to position lines to minimise the risks to flying, I'd hope, once they see the impacts clearly and if there is enough pressure applied. Standing together on this is vital.