rarman,
There are limits on the value of what can be bought into the UK from outside the EU. The problem with gift is that often you then can't get insurance which is a little unnerving for both the seller and the buyer especially on the higher value goods.
That said if it is marked as a gift and the value and postage are also clear to be seen on the package, chances are the VAT manwill charge anyway.
Roonga, the code needs to be clearly written near the address on the package.
Paul