I do hope that is not a Halon fire extinguisher next to the door.
ahem!
If you still have any Halon fire extinguishers, they must be properly decommissioned and disposed of immediately – the official deadline was December 2003. Halon portable fire extinguishers are very distinctive, as their canister is painted in a rich British racing green.
It is worth noting that Nu-swift produced gold halon canisters, the army used dark olive-green and British Rail used yellow ones so always read the label.
Your local Civic Amenity site should accept Halon extinguishers for disposal, but do ring to check first with your local council. It is strictly illegal to just dump Halon fire extinguishers, or to discharge them into the atmosphere.
Any existing Halon fire extinguishers should be taken to an authorised disposal agent with proper facilities to deal with disposal. You can find a list of such companies at the Halon Users National Consortium (HUNC) website at http://www.hunc.org