I've been playing around in-between our conversation but with no luck as yet but I will give that a go... I've decided to take the graphic in question over to PSD to get the effect I'm after there. This job has taken too long already and I can't wait any longer!
I really want to thank you soooo much for all your help anyway and I'll let you know if I solve this riddle. It may be something I'm doing wrong but I'm pretty sure that the only variable that has changed is the new update for Indesign CC 2014 as it was definitely working before hand.
Take care and thanks again.