@Vekke - The radiator is much farther forwards than it looks due to the curvy nature of the engine and because the engine is mounted north-south. I'll take a better look in the summer though.
I started blocking using pipe insulator I had in my loft from when the gas people fitted me a new boiler the other year :
This is as far as I got as progress was interrupted by some storms, some kind of annual festival (not sure about it, it seems to involve a baby and sprouts...) and a very bad cold, so this is as far as it got.
On the other mod front I did manage to fit my Pure DAB Radio thing that Mrs A got me for that festival thing - I could be inside and relatively warm for that but it has caused a relapse in the cold.
Hot Toddy is on thecards, or maybe 3.
Happy new year everyone.