Walking my dogs late at night, I just happened to look in the north west sky and saw a slow moving object coming towards us. It appeared to be square in shape and had about eight flashing red lights with two more that flashed twice as fast as the other eight. I was excited as I thought it may have been the space station and went to get my wife to watch it with me. As it got closer, I noticed the craft was actually quite low and was not a plane, jet or space station. There were no tail lights flashing and the typical red/green lights of a plane weren't there. There was no flashing white tail light either. The craft flew directly over us and it was a clear night so it was very clear and visible. I would say it was no higher than a few miles above us. It came through the regular flight path of the Manchester airport which was really odd seeing how slow it was going. We waited to hear sound from the engines and there was absolutely none! The craft headed towards! the northeast and about two minutes later, there was another craft, exactly the same and on the same flight path. As it got closer to the coast, the two caught up to each other and when they met, they stopped sat for a bit and then took off extremely fast together and we lost sight. Before bed, at about twelve, I looked outside from our balcony, and saw two more craft towards the Derry area flying much closer together and lost sight due to being in the house--no noise, same lights on these two craft. Definitely square, definitely quiet, no flashing avoidance lights just flashing red on the silhouette of the square crafts.