The winner won't be paying £4m for it though, so it doesn't really matter what the actual value is. I always wonder who can afford to pay £15k a month for rent. That has to be a limited market, surely?
If it's not in the middle of beyond I'd happily live in it, at least for a few years. Often the Omaze houses are too remote for me though, as I don't drive and don't like solitude for too long.
What is the building at the side of the cottage? There seems to be a long annexe of some sort on the photo, but it's not on the plans.