The first thing to do here is to drain the oil. The drainage plug is on the front of the sump and requires a large allen key to undo it. I used the type that comes in a set that you can put a socket over for leverage. Note there is another plug on the underside which is fixed in place and should not be undone as this is not for draining the oil. I failed to take a photo of the oil drainage because oil and cameras don't really mix. 

With the oil drained, the dry sump connections can be removed. First is the oil cooler return to oil tank (top connection):

You'll need to loosen the oil cooler end so that you can rotate the pipe away when the tank end is disconnected. The pipe will still contain some oil so be ready with rags.

The other oil cooler connection is lower down the tank. 2 nuts to undo this time, and there's an o-ring in there so make sure you don't lose it.

Again, the bottom hose can be loosened at the cooler so that it can be rotated out of the way. The fittings for these pipes are quite large so you need a decent sized adjustable wrench to get them undone, and be sure to tighten it up properly around the nut so you don't round it off, as they are aluminium fittings and no doubt the pipes are very expensive.

The oil tank itself comes out with the engine, so there are two mounts to unfasten. The first one sits inside the rear wing (oil cooler top just visible in picture):

The second one is in the engine bay:

In the photo below you can see a diagonal chassis rail running across the oil tank. The oil tank is shaped with a recess for that rail, so when you drop the engine you have to make sure that the oil tank is pulled away from the rail. I did this by putting a strap around the oil tank and around some of the frame. It looks a bit heath robinson but in fact it works very well and enables the body to be lifted away from the engine without any scuffing or catching:

There is an earth connection to be removed from the oil tank. In the image below I've already removed it. As you can see it is quite a small thin wire and easy to miss. It attaches to the underside of the tank if I remember correctly, on the side of the fitting that locates it onto the engine cradle (sorry, forgot to take a photo of its location).