I bet the formation guru's will give us a good education in not losing sight and what to do and not do if you do.
Done a bit in my time, 100-650kts. You either push to stay in sight, pull the power off to drop back fast if you lose sight, or turn away promptly (with a pull up to assist) to get away from the person you've lost. I'll leave it to you to work out which one would work in this case!
