Just a basic remote will do the trick. The Nikon one works so that you press the remote button once, then a second time when you wish to stop it. I don't know about Sonys, but using the shutter button on the camera means you have to hold it down.
Yeah, that is what I'm going to get, since holding down the button on the camera for at least a minute isn't the best of things to do in the cold and dark when you're sure there is someone at the farm buildings behind you.
Just something which locks or as you said for the Nikon one, press it to start and again to stop. Will pop into Jessops later this week, was going to order online but the Posties are still throwing their toys out of the pram.
Liking your picture though, alot sharper than your previous one, if only the man had kept his head still for just a bit longer.