Hi Vince,
Thanks a lot for taking the time to write.
Yeh I have saved the file since nesting,its been quite a long editing process.
Your work around is a clever one but I cant use it on this project as the nesting was arranged for the multicam view. Ill try to attach an image of what I mean.

For the multi cam view you arrange all your camera angles in one sequence drag it into another and then you can select between them easily in real time. Very handy feature but it does create this problem. Also part of the editing process has been to move clips here and there, play with time a bit and so on so it doesnt really match up in a linear way with the source sequence any more.
Im beginning to think I may be up the creek with this one…
I havnt been able to find any unnesting command in premiere on any forums etc.
Ho hum…