Plugged into a tender and leave it. Most damage is done to an engine when starting from cold, you are better off leaving it. Also the sprag clutch won't thank you for it.
At the start at end of Winter you should wrap your bike up nice and snug and ship it off to Spain in a lorry with it's friends. Then ride her hard for four days1 until all that nasty condensation and UK dampness has burnt away.