Cheers dave
Theres a top secret quick way of doing it mate!
because its taken on a white background, I made it a multiply layer in photoshop over the background colour I use.
totally cut out in an instant... but without any highlights / bright areas..
so for those I make another layer and past the original image in again, and quickly delete most of the photo with the erase tool, leaving only the bright areas that the previous stage lacked.. its a lot quicker and easier than cutting it all out by hand.