Unfortunately not at the moment as certain types of people, you know... the ones that have an eyepatch, wooden leg and sail on the seven seas, will use this to their advantage and share the..ahem.."booty" with others.
Not saying you would do this, but what I said above may be the reason why there is not an option of doing so at the current moment in time - who knows what Virgin may have in store in the future however.
I'm off to bed now otherwise I will not getting up in the morning, my sleep pattern is all over the place
