GU 4.5 Petrol Need to empty fuel tank

Hi All
what's the easiest and quickest safe way to empty the petrol tank?

Through the floor in the rear.

Thanks John do you know of any images of the procedure?

Mate, you shouldn’t need pics if you take a look. Take the cover off and unscrew around the sender unit and take the lot out.
It will give you room to get your hands in there to clean if needed.
When I converted to diesel I syphoned the petrol out and wiped the inside with a clean rag

There should be a drain plug too on the bottom, but maybe all don't have it. .

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Thanx again