A pedal (10) is formed from a single moulding and includes first and second arms(12, 14), each provided with an over moulded marker (16, 18). The pedal (10) hastwo fittings (20, 22) for coupling with a brake actuator rod (24) and a couplingmember (26) respectively. A castor (40) includes a wheel (42) which can rotateabout a bushing (44) and a coupling shaft (46). Within the shaft (46) there is provideda brake mechanism for locking the wheel (42). A base frame (80) for a bed includeslongitudinal and transverse struts (52, 54) arranged in a rectangular form,with four castors (40) and four associated pedal assemblies (10). Two actuatorrods (24) are provided, one for each pair of opposing pedal assemblies (10), whiletwo connecting elements (26) are provided, one for each pair of side-by-sidepedal assemblies (10). All the pedals and thus all the brake mechanisms are coupledto one another through the two actuator rods (24) and two coupling elements (26).When one pedal (10) is actuated all the castors will either be locked or will allbe released by a single operation.
