2 bright lights, fading in and out, following the line of a chemtrail.

My name is ((name deleted)), I work in a fish and chip shop in England and it was out the back of the kitchen this sighting took place.  It was around 9:00 am and broad daylight, fairly sunny day.  I'm literally reporting this one hour after I witnessed it.  I went outside as the fish delivery man had just pulled up with his daily delivery.  I had noticed about 7 or 8 chemtrails in the sky and I was looking up at the newly forming grid of trails in the sky as I was talking to the delivery man.  That's when I noticed a light floating very smoothly from the left of the sky towards the right.  It seemed to be following the path of one of the huge chemtrails. It made absolutely no sound.  It wasn't a plane as I'd seen a few of those minutes earlier and knew for sure this wasn't the same.  I pointed it out and the delivery man stood and watched this with me for about a minute.  He noticed a second light floating close to it.  As we were watching we were quite blown away and just ! questioning what they could be.  We easily ruled out anything conventional.  They seemed to be going in and out of visibilty.  We saw no shape or solidity, they were made of bright white light.  They would just dim right down to the point where we could barely see them and then light right back up.  I'd say they were lower than the usual height of planes but its hard to tell.  They were moving very slowly.  If it adds anything to the report, the delivery is extremely skeptical as ive had discussions about various things before and even he was baffled and admitting he did actually believe they were UFOs.