As a commercial centre, we keep a fairly large quantity of fuel in our petrol locker (small concrete structure with fire resistant lining & ventilation) and we used to have a licence from the Council to store up to X amount of fuel, however we were notified quite a while ago that we no longer needed a licence to store fuel.
This is from the Trading Standards Website:
On 9 December 2002, a new set of Regulations called The Dangerous Substances and Explosive Atmospheres Regulations 2002 came in to force. These say businesses storing petrol in cans and / or drums no longer need a licence but must the must comply with the new regulations. The regulations expect each business to carry out a risk assessment and then introduce or maintain appropriate precautions to minimise the risk of a fire or explosion.
Also, all our excess fuel (i.e. not in an actual petrol tank) is currently located in 10L Explosion proof containers because it needs to be transported from our fuel depot (we're council owned) to the centre via Land Rover which has explosion warning stickers etc front & rear.