V8 plug leads

I have a series 2 v8 disco and need to change the plug leads which seem to disappear behind the back of the engine and the bulkhead.
I've never worked on this engine before so I've no idea how to get to the 'Dizzy' end of the leads, can anyone help and is it a pig of a job ?
Thanks, Phil.

hi phil
If you have a d2 then there is no 'dizzy'
the leads disappear into the coil packs , one for each side and yes it is a pig of a job , especially if you have lpg fitted which can raise the inlet manifold.