Thanks for the comments chaps.
I've been flying the skies for 30 odd years and never seen anything quite like this.
Might be LED's I suppose. The other A/C was a few miles away laterally and as an anti col-light it certainly shows up well.
I expect we will see a lot more of them.
"ab33t".
As for being a UFO, well it was flying and I couldn't identify it so I think your'e right.
