Hi Tricia,
A lot depends on what is important to you - Security, Interest Rate, Instant Access?
My only thoughts with investing abroad would be that this is usually inherently more risky - clearly the funds will not be protected by the FSA plus it's in a different juristiction from an administrative point of view - not to mention the fact that I presume you'll need to convert currencies so you run the risk of losing(or gaining) depending upon what the exchange rates do.
I'm sure if you indicate what is important to you then the members of the forum will try to help with specific ideas :)
All the best,
Jim