As it turns out, Speedtest on iOS recently put a VPN Beta in place in their app as an option. It looks like they are running a trial and so far I have used 9% of my allotted 2Gb. Below that info is also "Until Mar 26" so that's probably the end of testing for this version I assume. It does solve the issue with the UK sim not allowing a US service like Pandora to access the interwebs though.