SIGHTING REPORT UFO sighting at Basingstoke

Four dim points of light (or perhaps shapes reflecting light pollution). Three formed an equilateral a triangle shape, pointing in the direction of travel, with the additional point ahead and slightly to the left hand side (as they flew) - but it looked as if the triangle split up as they started to disappear into the light pollution over Basingstoke

This was spotted while I was photographing the lunar eclipse. At first I thought I was looking at an aeroplane, but then I realised that the lights/reflection were a) too dim, b) were all the same dull reddish brown colour (similar in colur to the moon at the time) and c) none were flashing. The lights/reflection made no sound that I could hear.
So far I have discounted:
a) fast low flying aicraft. The police spotter plane flew over about an hour later and was clearly visible and audible.
b) birds reflecting street light. Too fast and to regular a shape.
c) Commercial aircraft without lights - if it was low the silhouette would have been visible. If it was high it could not have travelled so fast - several commercial flights flew over during the time I was outside. In addition they were audible.