sandbox for UK
After spending about 2 hours on the paypal site, it appears there IS a way to integrate paypal payments pro into a UK sandbox account, it's just that none of the ways in which they tell you is possible actually work.
Webassist ecart isn't on their list of integrated shopping carts, and I keep going round in circles, or getting directed to help guides.
It seems to me that if you aren't in US, get to the back of the queue!
If anyone in the UK has got a sandbox account working with paypal website payments pro, i'd love to hear how you did it.