Was it an ASTOR Global Express?
Seen today - not by me - on the A 68 near Halton in Northumberland. UK 0930ish. Described as an "executive jet" and very low (mil height.) heading South West.
I'm guessing it was transiting Otterburn to Speydaddam.
Possibly a Global Express with ASTOR?
Anyoe know?
Cheers
Dan