Abstract: A portable tank support and liquid containment system for a tank containing a liquid. The system includes (a) a basin having a floor and upright walls integral with the floor, and (b) support within the basin for supporting a tank above the floor in a stable and secure manner. Preferably the walls of the basin are double walls to better protect against loss of liquid in the event of a spill.

Abstract: An actuating device has a cartridge within a fixed casing. A card-like key has a key formation which, during insertion of the key into the cartridge, displaces a finger formation connected to an interference formation, which is then aligned with a gate of a gate member fixed to the casing. The gate allows passage to the interference formation allowing the cartridge to be displaced in unison with the key. An actuating formation on the cartridge is provided to actuate a lock or similar device.