Thanks Bernard - very helpful

This part is what I need

Does my parents' TV Licence cover me while I'm away at university?
Your parents' TV Licence won't cover you while you're away at university.
There is just one exception to this rule. If you only use a device that's powered solely by its own internal batteries, you will be covered by your parents' TV Licence. However, you must not install the device (e.g. plug it into the mains) when using it to receive TV. To check whether this exception applies to you, see student information.

Basically, if you are a student and have a laptop or mobile, you can watch TV as long as you are plugged into the mains. So you charge your device up and then unplug it and then watch Live TV.