Heading about 350deg were two A/C at cruising altitude, standard horizontal seperation, absolutely neck and neck, while about a minute behind was a third A/C, gaining on them, and further back by about another 90 seconds, a fourth A/C absolutely tramping it. Of the first two, one took a 10-degree left hander about 3 minutes after it passed me (IE about 3 mins north of the Firth of Forth), and the fourth A/c did the same. Not sure where the other two went.
Very reminiscent of Peters' Comet RTW screenies
