A search will help as I know there's a good photo about but your main hidden ones are in the bellhousing between the engine and gearbox. If you follow the seal line you'll come across 2 small D shaped holes. If you rotate the crank pulley you'll see there's a notch in the flywheel and looking up the hole through the notch you'll see a bolt (you'll need a long allen key to reach it). Rotate the flywheel notch to line up with the other hole and repeat.
Then there's a couple of hard to see ones at the top rear of the engine on the passengers side. You'll need a crank necked ring spanner for one of them.

 

Hi there,
thanks for that. Yeah been trying to find a photo but not yet successful, and I can't find the two holes( should have gone to Specsavers) I have a 5 mm Allen key that is about 6 inches long, on a t handle. Do I Need to drop of gearbox mounts or anything else? Would be easier if it wasn't raining all the time and I wasn't laid under it on my driveway!!

 

Here you go
http://www.vwt4forum.co.uk/showthread.php?t=335448&highlight=sump
Care of Interslice. He helped me loads. In that picture the sump is on the left. If I recall there's a gearbox support under the engine that has a sort of forked end. If you remove this it will help a little and the holes are very near it. The holes really are quite small. Around 10-12mm.

 

Oh, a torch will help and if it ain't raining then the jobs not worth doing eh T:

 

Thanks for all the help. Found the little suckers and now I'm in. Big ends replaced and rebuild in progress, do I need a new oil pump as I can see nothing wrong with the old one.

 

I don't know if you need a new oil pump. I don't know why you were thinking of replacing it in the first place. The oil pump is located behind crank pulley and all the belts and shields need to be removed to get to it. You'll not be able to see it's condition from inside the sump.