There's lots of discussions about this, it is thought that if a new bulkhead/firewall is put between the tank & the engine it 'should' be okay. But this is all theoretical until some-one actually presents one for IVA.
hi jon from Yeovil " i put a 6l extinguisher inside a 9l extinguisher made drain holes in bottom as i have one on each side 12l not much but could work ? . is this legal as it is seperated from both the eng and people,,