OK, update on the MMS for 3UK problem. A very helpful user by the name of nutmegy has solved the issue. There is a couple of lines of code at bottom of the build.prop file.
This code looks like this:
You just need to modify build.prop file to have the following IP addresses. I.e. delete the numbers above, type in the numbers below.
Then, Normal restart your phone - a hot restart didn't work for me - and you should then have MMS and access to planet 3.
Huge thanks to nutmegy.
PHONE: HTC One S
ROM : Stock 3UK
"This was no boating accident"