We went to the flatlands near Goole in East Yorkshire. It is very different to north Cumbria. Not just flat, but intensive arable farming. The visibility wasn't very good. It was a murky day. I wondered how far you could see. The furthest pylons in the distance were about 1 little finger width high - so about 1 degree. The usual calculation, based on the fact that a pylon is about 45 metres high, suggests they might just be 3km away. That' not very far considering that I could see a mountain 50 miles away in Scotland last week. Next time I visit I shall hope for better visibility and repeat the exercise.