I got into a groove with the alterations to the house in the last few days so that since the previous post about it I've managed to get it finished.
(Which is the second time I've said that - hopefully there won't need to be a third!)
To illustrate what I've done to it here are pictures of how it looks now and what it looked like before.
I'd like to think that you can't really tell that it wasn't supposed to be like that all along.
So if I hadn't have confessed to the cock-up on here no one would have been any the wiser.