Well the Land Rover lives again. Changed the belt, crank pulley and front oil seal last night. This morning was the new rocker are and push-rods. The only worry was when I noticed that 2 of the valve stem caps were MIA. 10 minutes of me sat on top of the engine with a lamp and pearl catchers sorted that one out.
Set the valve clearances and it started first twist of the key. Sounds far quieter now. Just off to fill it up with some diesel and give it a test drive.

Fingers crossed.