So I followed your link LondonDragon and found that local to me was
Abbey Fire Protection LTD
Location : Koblenz House, York Lane, Brinkworth, Swindon Wiltshire,SN15 5AN
Tel : 01793 726818
Services : empty FE 2kg co2 exchanged for full one for £10 it took 2 minutes. Nice man.
Date...