Thank you, the order of my partitions is SWAP ROOT then HOME. I booted with the live cd as suggested and i can indeed shrink the SWAP partition down to 3gb. That then leaves a new block of about 16gb. Naively i had hoped that i could merely enlarge the Home to contain this new block, not quite as easy as that. The new block seems to have the same property as a bubble under the new wallpaper! I can chase it but i can't get rid of it so to speak.
You couldn't be so kind could you as to point me in the right direction?
I think your best bet at present is to enlarge the swap again to fill the space.
To add that space to your /home would require you to move the / partition into the space, then expand /home to include the space vacated by root.
Unless you have a dire need to do this then I suggest don't bother.
The alternative would be to create a remaster of your present install, check it for functionality, repartition the drive as you now wish, and reinstall from the remaster.
Personally I would not bother unless I was badly short of a few GBs of HDD space.