A tamper evident container (2; 102; 202) made from cardboard, paperboard or other lightweight foldable sheet material comprising: a container body comprising a first pair of opposed side wall panels (8, 10) and a second pair of side wall panels (12, 14), the side wall panels (8, 10, 12, 14) being hingedly attached to each other about respective side wall fold lines; a lid hingedly attached to one side wall panel of the first pair of opposed side wall panels (8, 10) about a lid fold line; first and second closure flaps (28, 30), each hingedly attached to a respective one of the second pair of opposed wall panels (12, 14) about respective closure flap fold lines (32, 34) so as to define respective locking slots (36, 38) between a side edge of the respective closure flaps (28, 30) and the other side wall panel of the first pair of side wall panels (8, 10); the lid comprising: a lid panel hingedly attached at a proximal edge to the one side wall panel of the first pair of side wall panels (8, 10) about the lid fold line; and a locking flap comprising a first locking flap panel hingedly attached at a proximal edge to a distal edge of the lid panel about a frangible line of weakness and a second locking flap panel hingedly attached at a proximal edge to a distal edge of the first locking flap panel about a locking flap fold line and folded about the locking flap fold line so as to lie behind and in a face to face relationship with the first locking flap panel; a distal end (74; 174; 274) of the second locking flap panel comprising at least one free edge forming a locking edge (76; 176; 276); the locking flap being insertable into the locking slots (36, 38) such that the at least one locking edge (76; 176; 276) of the second locking flap panel engages behind the side edges of the closure flaps (36, 38) so as to lock the lid in position, wherein the second locking flap panel is adhesively attached to the first locking flap panel to prevent the second locking flap unfolding relative thereto, wherein the second locking flap panel is adhered to the first locking flap panel through an adhesive tab (80; 180; 280), characterised in that: the second locking flap panel comprises a pair of cut lines which extend to the distal edge of the second locking flap panel so as to define an adhesive tab therebetween, and a pair of locking edges on the distal edge on either side of the adhesive tab. a container body comprising a first pair of opposed side wall panels (8, 10) and a second pair of side wall panels (12, 14), the side wall panels (8, 10, 12, 14) being hingedly attached to each other about respective side wall fold lines; a lid hingedly attached to one side wall panel of the first pair of opposed side wall panels (8, 10) about a lid fold line; first and second closure flaps (28, 30), each hingedly attached to a respective one of the second pair of opposed wall panels (12, 14) about respective closure flap fold lines (32, 34) so as to define respective locking slots (36, 38) between a side edge of the respective closure flaps (28, 30) and the other side wall panel of the first pair of side wall panels (8, 10); the lid comprising: a lid panel hingedly attached at a proximal edge to the one side wall panel of the first pair of side wall panels (8, 10) about the lid fold line; and a locking flap comprising a first locking flap panel hingedly attached at a proximal edge to a distal edge of the lid panel about a frangible line of weakness and a second locking flap panel hingedly attached at a proximal edge to a distal edge of the first locking flap panel about a locking flap fold line and folded about the locking flap fold line so as to lie behind and in a face to face relationship with the first locking flap panel; a lid panel hingedly attached at a proximal edge to the one side wall panel of the first pair of side wall panels (8, 10) about the lid fold line; and a locking flap comprising a first locking flap panel hingedly attached at a proximal edge to a distal edge of the lid panel about a frangible line of weakness and a second locking flap panel hingedly attached at a proximal edge to a distal edge of the first locking flap panel about a locking flap fold line and folded about the locking flap fold line so as to lie behind and in a face to face relationship with the first locking flap panel; a distal end (74; 174; 274) of the second locking flap panel comprising at least one free edge forming a locking edge (76; 176; 276); the locking flap being insertable into the locking slots (36, 38) such that the at least one locking edge (76; 176; 276) of the second locking flap panel engages behind the side edges of the closure flaps (36, 38) so as to lock the lid in position, wherein the second locking flap panel is adhesively attached to the first locking flap panel to prevent the second locking flap unfolding relative thereto, wherein the second locking flap panel is adhered to the first locking flap panel through an adhesive tab (80; 180; 280), characterised in that: the second locking flap panel comprises a pair of cut lines which extend to the distal edge of the second locking flap panel so as to define an adhesive tab therebetween, and a pair of locking edges on the distal edge on either side of the adhesive tab.