A temporary structure, said structure formed from: two or more construction modules (1, 1') detachably attached to one another; each of said modules (1, 1') comprising an elongate member having a substantially L-shaped cross-section, each of said modules (1, 1') comprising at least first and second panels (3, 5) provided adjacent and substantially at right-angles to one another, along the length of said module, said panels (3, 5) connected so as to form said L-shaped cross-section; the elongate member of a first module provided with connecting portions (11, 13) arranged to detachably attach with connecting portions (11', 13') on second and further construction modules, to form said structure; said connecting portions (11, 13) are arranged to permit detachable attachment of said module to second and/or further modules rotated 180 degrees thereto, in an inverted manner; wherein said first panels (3, 3') of the modules (1, 1') are provided to be substantially vertical panels, forming at least part of a face on a side of the modules (1, 1'); and the second panels (5, 5') are provided to be a substantially horizontal panels, forming at least part of a base, floor or top of the modules (1, 1'); and wherein said structure comprises a first plurality of construction modules located adjacent one another along a longitudinal axis; and at least a second plurality of construction modules provided located adjacent one another along a longitudinal axis and rotated 180 degrees with respect to said first plurality of construction modules, said rotation being about the longitudinal axis of the construction modules; characterized in that construction modules of the second plurality are positioned offset from construction modules of the first plurality along the length thereof when detachably attached thereto, along the longitudinal axis thereof. two or more construction modules (1, 1') detachably attached to one another; each of said modules (1, 1') comprising an elongate member having a substantially L-shaped cross-section, each of said modules (1, 1') comprising at least first and second panels (3, 5) provided adjacent and substantially at right-angles to one another, along the length of said module, said panels (3, 5) connected so as to form said L-shaped cross-section; the elongate member of a first module provided with connecting portions (11, 13) arranged to detachably attach with connecting portions (11', 13') on second and further construction modules, to form said structure; said connecting portions (11, 13) are arranged to permit detachable attachment of said module to second and/or further modules rotated 180 degrees thereto, in an inverted manner; wherein said first panels (3, 3') of the modules (1, 1') are provided to be substantially vertical panels, forming at least part of a face on a side of the modules (1, 1'); and the second panels (5, 5') are provided to be a substantially horizontal panels, forming at least part of a base, floor or top of the modules (1, 1'); and wherein said structure comprises a first plurality of construction modules located adjacent one another along a longitudinal axis; and at least a second plurality of construction modules provided located adjacent one another along a longitudinal axis and rotated 180 degrees with respect to said first plurality of construction modules, said rotation being about the longitudinal axis of the construction modules; characterized in that construction modules of the second plurality are positioned offset from construction modules of the first plurality along the length thereof when detachably attached thereto, along the longitudinal axis thereof.