DEAD EASY...
I got the seals and tap kit ready in advance
It's on the drivers side, infront of the rear axle and it's just below the boot floor.
Under the car, looking up from the passenger side over where the rear prop shaftmeets the rear diff you will see it on the drivers side
Haynes says to undo the fuel line, and hold it higher than the fuel tank to stop any fuel coming out but seeing as the boot floor is directly above it that might be hard so I left it connected.
In the middle on top of the sedmentor is an 11mm bolt holding it on, get yer ring spanner out as a socket or a ratchet type ring spanner would not fit over the top
Get a suitable container underneath once the bolt is loose, support the sedimentor then finish unscrewing. It may be stuck there cos of all the crap you off road beasts will have covered it in. So give it a tap if needed.
Right, then my camera died, and then my phone so no more pics.
The unit comes out in one piece but it is actually two, so I emptied all the crap, and there IS crap in there (for those who have been lucky enough to experience a blown head gasket imagine that murky scummy crap and then imagine it's thicker more scummy cousin).
Using a rubber mallet I tapped around the middle of it to seperate so I could replace the middle seal.
Up where you took the sedimentor from you will see a plastic cone like object, remove it and you will see a thread coming down with a small o-ring which was keeping that plastic cone in place and the other seal is around the outside part.
I rubbed all the bits down especially around the seal areas and then cleaned with parafin and let dry.
Put the seals in, put the two parts of the bowl together and then offer up and do up the bolt with your fingers to keep it in place then get your spanner back out and tighten back up.
Roberts yer mothers brother.