Evening.
Thanks very much, all.
Sentry picture was just a matter of luck really. Was flying back after picking up an aircraft at East Winch (Nr Marham) and got a transit straight over the top of Conningsby and Waddington. Just as we approached Waddington we were informed that there were two aircraft in the visual circuit. Got lucky and passed a 1000ft straight over the top of the 707 :).