Thanks, DML ... having dragged out my P2 box-file that all fits. Nigel went to be OC ERD, and I took over from him as MR1 at NATS [despite being completely unqualified for the post!]. I was really pissed off, as I was the most experienced ERD wg cdr in the circuit ... over 7 years there, man and boy over 2 tours, from fg off to sqn ldr Senior Sup and OC Trg Sqn. But AOC MATO pulled the strings, as I noted up-thread, so that was that. The start of my deep disillisionment with the Branch! Still, at least as MR1 I gave you the CATCS VISSIM, even if I was never invited to the opening!