I found this on the web, hope this helps ..................
To retain the IP pulley and timing belt tension inside the timing case whilst removing the IP the rover manual calls for LandRover Special Tool LRT-12-045.
When doing a timing belt replacement you would have used part of this kit to lock the IP at TDC. In place of the flash LR retaining pin you can use a 11/32drill bit.
Now to make the LRT-12-045 plate.
To make things easy I used the IP to pump pulley retaining plate (held on with 3 bolts accessed through the front cover hole) as a template. LRT-12-045 needs to have holes made in three places. The large U-shaped hole which is where the 11/32 drill bit slides through to lock the IP and the two slotted holes. I used some 100mm by 10mm thick Al flat I had lying around and made the retaining plate 100x100mm.
In the middle of this I copied the template holes and then drilled them out as best as possible. The pictures show the end result-rough but functional.
You will also need two retaining bolts M8 I believe, with the 10mm plate I needed about 35mm of bolt shank to secure the pump pulley.