Drive to Berlin and pick it up yourself. Remove packaging. Drive back. If customs asks when coming back through the border inform them that you lived in Berlin and are patriotically moving back to blighty in order to claim your blue passport and feast on gammon.
We bought ours from a shop based in Berlin - which at the time was fine but now we have to pay for all of the duties...
Think you should be ok if it's a UK company but worth checking. Right shitshow