UK tax in relation to bitcoin

[sindikat]

Do you have to hold on to bitcoin for over a year to it to be liable for capital gains tax ?
If under one year would I have to pay income tax ?

As far as I know is the norm of the tax legislation of Germany. I just don't understand how you can track how many bitcoins you have and how long you keep them. It seems to me that such rules exist only for those who voluntarily comply with them. Perhaps these standards prescribed in case the German banks will open personal accounts in bitcoin?