Thanks for all your feedback - I'm looking into Gparted at the moment - though I'm a little nervous about Linux, I have had no exposure to this at all.
'Partition Commander' unfortunately costs and cost is a definite barrier, although I do feel that some form of partition tool/s would be beneficial.
I considered ghosting the drive and repartitioning - but there's no software, apart from a facility in an imaging utility, for that either!
I was aware of Diskpart but the command line aspect shelved it for me for the time being. I'll review this if I have no luck with Gparted.
Thanks for all your help and the rapid responses - I'll let you know how I go on.