I'm currently touring around Europe in a motorhome and was near Stonehenge (driving past it actually) and the sun was setting, the light was perfect, I had to pull over and get my P3 4K up in the air to do some shots.
Go for it Gez, one Sunday morning with the current sunrise at 4:30 - 5:00 I've travelled down twice purposely to do it, stayed at the Travelodge there but on both occasions the weather wasn't too good.