FFF
What you are proposing is illegal, although the legislation concerned is actually the Air Navigation (Dangerous Goods) Regulations 2002.
You would be committing an offence under Article 5, which makes it illegal to take, or cause to take on board an aircraft, dangerous goods which include cannisters of fuel.
Unfortunately for you, this is a pretty clear-cut piece of legislation. You should make an intermediate fuel stop and accept the slightly longer flight time.... After all, [cheap shot] why do we do it, if not for fun [/cheap shot]