My partner and I seen an object with hazy amber/yellow lights which look like a giant jellyfish flying slowly over east London 15/09/07

At 00:20 I was at my kitchen sink and when I looked out of the window and seen what i first thought to be a low flying plane at first glance. I opened the back door to my flat and was shocked  to see and object which had in defining features but a hazy low amber lights. There what appeared four of them but all seemed to be apart of the same craft.
I shouted to my partner to come and see this thing in the sky, when she seen it she described it as a large jellyfish. The object was not travelling fast and did not change in speed or make any sound, the lights were fairly large and two of light on each side seemed to circle round the middle lights. We watched this for a few minuets and it disappeared over the building.
As I can not explain what it was i fear my description would not give it the affect it had.
This flew over east london 15th September 2007, i would to know if anyone else seen this or give some explanation to what it might of been.
This case corrected on January 08, 2009.  In error, we indicated that the sighting had occurred in London, Alaska.  Our error, and our gratitude to a careful reader.  PD