Maxred & peacock, it doesn't matter what was briefed, if you have lost sight of the other aircraft you don't keep pulling on the stick... The contract generally is n+1 avoids n avoids 4 avoids 3 avoids 2 avoids 1.... and then after that lead does his best to fly smooth and predictable.
An example would be on the pitch lead sees a flock of birds so eases his pitch to go around them. This does not make it okay for #2 to hit him (because he had a slack pitch different to that briefed). #2's first responsibility is to stay visual and avoid lead.