anyone thinking they can just buy a bowser-full of Motor Spirit or Avgas and park it in their back yard, is in for a big surprise.
check the UK Petroleum mixtures and Petroleum Spirit storage,handling.transport and dispense regulations.
had Petrol NOT been a "legacy" fuel , there's no way it would be available outside a strictly-controlled professional-user environment.
Truth is. this highly volatile low flash-point fuel is highly dangerous.
the majority are far too blase in their approach to it.