So today I went back to trying to fit the radiator.
A big problem here was that the front panel had been pushed back which was interfering with the fit of the radiator so first I used a length of wood and a big hammer (!) to bash out the front panel from the engine side.
Next I fitted up the radiator with cardboard covering the front of the engine initially to protect the radiator. The two pictures show the start and end of the process whcih looks straight forward enough but it was far from it. I needed to do a great deal of "fettling" to get the mounting points in a position where the radiator could be fitted.
I checked and found that there was clearance between the bottom of the radiator and the panel work this time but was not quite satisfied there was enough. I solved this by fitting spacers between the radiator side plates at the bottom and the mounting points on the panelwork which was tricky but manageable.
Having acheived this I then went to fit the elctric fan which mounts the grille side of the radiator. Amazingly I couldn't get it in from the front and even loosening the top bolts on the radiator wasn't going to give enough room to slide it in from the top on the engine side.
Now I know when to call things a day and this was one of those times! I'll return to this another time and that large hammer may come into play again.