LIFT THE rear right seat,peel back the carpet.You'll see a black disc,undo the screws.Under the disc is a ring that can be opened using a lump hammer and a cold chisel,tap the ring anti clockwise(I think),its has to turn 3-5 full rotations(cant remember xactly)undo pipes and lekky conector.Oh it might be handy to vacuum dust and crap from aound the sender before removing.
Did you get it home alright?
On another note, did you get out to that place at the weekend Joe?
If that's the case, you should email Shell and all the other oil companies out there. They've been using costly fractional distillation to separate the components out of crude oil for ages, rather than simply leaving them in a tank and allowing them to settle!