Cheers Andy. That one is an older one from last year. As I said they look quite good when lit with red lights from the inside but it was surprising how quickly it got light. They are hard to shoot as you need to get close to avoid the pylons and other building going on around them still (visitor centre etc) but as soon as yuou do that you need to go wide angle and distortions set in. Even adjusting the images in Lightroom you still get some strange efffects. Where they are positioned you cannot get a decent head-on view of them. Still, that is a good reason to go back and try again!
The GoPro 4K is only 15 fps which is really too slow to be practical. Even the lorries on the motorway look juddery at that frame rate. The pan was, at least I thought it was, quite slow, so for it to be any good it would need to be static shots only. Stepping down the size gives more options but probably still produces decent images to work with. GoPro 4 has better 4K options as it can go 30fps. 2.7K gives you 50fps which would be a better compromise I think.