As for ram mounts, they also have a British website (but most GPS places sell some of the ram mounts also.
What's good about the RAM system is that you can mix and match. So much so, that it can be a bit daunting to be honest. On the other hand, you can usually buy a different arm or something else if it's not completely right from the get-go.
Anyway, here's the link:
http://www.ram-mount.co.uk/
