Abstract: A toilet bowl rim mounted dispenser for receiving a block of product to be dispensed into the toilet is disclosed. The dispenser includes first and second body parts rotatable about a hinge, and a hook for suspending the dispenser from the rim. The body parts include at least one releasable catch which is engaged on rotation of the body parts from an open to a closed position. One body part is provided with a locking means which is biased towards a first position in which it acts on the catch to resist release of the catch but is movable by applied manual force to a second position in which the catch can be released. The locking means has block engaging means which engage with a toilet block when the block is present in the dispenser to prevent release of the locking member while the dispenser contains a new toilet block.