great, thank you all for the feedback so far. Picture is definitely not a cut and paste job, but I know why you guys are saying it. Its due to a mask applied in LR. I will rework the image taking on board the feedback above and post a reworked version. I appreciate somethings have to be done right in camera, so that will have to be things to consider in my next shoot.
Fill flash was used here, but I guess due to my distance from the subject, I may have squandered the light somewhat.
Ideas on OCF would be very useful. I was thinking of perhaps have a naked flash to camera left fired at the couple and then little fill from camera right?
Once again, all comments greatly appreciated! 