OK I'm answering my own question but it might be useful to someone.
I eventually traced the problem to a piece of software called "Open Garden". Though the problem is strictly with the this program and the last update. Not sure what the issue is but if you have this phone/tablet I sugest disabling this program for the time being.
Works a treat on all my other devices :-(
"Open Garden shares your Internet connection with your laptop, tablet or phone. No root access is required.
To install the app on your laptop or for AT&T users looking for the APK, go to:
It requires bluetooth and to be installed on all devices, such as your Android phone, laptop or tablet. Once installed devices automatically connect.