there was to objects high at altitude in formation they had a shape which made them look like a two jet black hanglidrers but there shaped changed with them becoming less wide and convex they then could have appeared to look like two B2 bombers. they were jet black in colour, with a mostly clear blue sky day.

they stayed in formation not moving apart from changing shape(not moving 30secs)i diddn't see them fly off just vanish, there one split second gone? the next.

they were very high higher than the laying cloud it was just there ability to hang in the air in formaition just becoming thinner around the saucer esque wings or delta wings that made them strange I have personally taken exams on silhoetting british mainly military aircaft. They were in a simple wing man formation but had no distinguished appearence i had seen other than disc type shaped ufso