You can do either, the shapeshift in Jaxx can be a bit buggy but is easier as it is already in your wallet imo. And yeah £5 should cover it, maybe use like £8 if you're paranoid about it.

Gutted, i'm headed to reading this year

Guess the only thing you could do is not turn up? Then again might be important so ..

How come the doctors wants a piss sample?? Can't you just say no?