A support system comprises a first component, a second component to be secured to the first component and to be supported, at least in part, thereby in use, and a coupling arrangement for securing the first and second components to one another, the coupling arrangement comprising a lock member secured to one of the first and second components by a crank, and a socket provided on the other of the first and second components and adapted to receive part of the lock member, wherein the lock member and the socket are designed such that the lock member can only be inserted into or removed from the socket when tilted or angled relative thereto.
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