I’ve experience a strange event with many others on the road. On a Sunday evening driving through Chilworth just south of Guildford there were a series of multiple flashes in the sky, the whole sky lit up repeatedly for about a minute as we drove along, we were not aware of any thunder storms around and there was no sound from it. Seemed to be coming from the south. Other motorists were slowing apparently from confusion of the source. Was way too big of a bright flash for it to be railway line cleaner machines. Wish I had been in a position to film it. The flashes lasted a couple of seconds maybe three each and were only seconds apart with the odd gap then would be back.
Was NOT fireworks or an outdoors event. -Fiona