They were flying at the same speed to allow the 76A+ to stay ahead and get the two aircraft in shot.
The formation was as requested by the photographer and was shifted to get the shots he wanted. This shot is one of about 40 Alan took of the formation. We'd earlier shot several pictures around an offshore platform as well.
155 was on a heading and speed and the 76C++/ A+ moved as requested. We were lmited on speed as the A+ had it window out for the photos.