You're right Zest, its the maths of percentages:
If you start with $100 and lose 50% that's a loss of $50, leaving $50. To get back to $100 you need to make $50 from $50 which is 100% gain to return to where you started.
Thanks for the useful info Rick, I will start looking at VPN options, it seems the way to go.
Cheers, Sharks