A tamper evident closure for a container is provided. The closure comprises a first portion including inner and outer parts, and a second portion. The outer part is movable relative to the inner part from a first position in which at least part of the first and second portions are adjacent each other to a second position in which there is a gap therebetween. The closure comprises locking means for locking it in the second position upon first opening so that the gap cannot easily be closed. The closure further comprises indicator means for providing a visual indication if the locking means is overridden to close the gap.