A method of forming a charge, the charge comprising a plurality of layers of fibre-reinforced composite material, the method comprising: clamping a first part of the charge with a clamp, a free part of the charge protruding from the clamp to a free edge; contacting the free part of the charge with a forming roller; and advancing the forming roller across a die so that it bends the free part of the charge over a convex corner of the die, wherein as the forming roller advances across the die it rotates about an axis of rotation which also advances across the die, and wherein the charge comprises an outer layer and an inner layer, the plurality of layers of fibre-reinforced material are positioned between the inner and outer layers, and the forming roller forms a first bend with the outer layer on the outside of the first bend as it bends the free part of the charge over the convex corner of the die, wherein as the forming roller advances across the die it presses the free part of the charge against a mould surface of the die, and in that the method further comprises: contacting the inner layer with a guide; bending the free part of the charge away from the mould surface of the die to form a second bend with the inner layer on an outside of the second bend; and simultaneously advancing the forming roller and the guide across the die so that they progressively draw the free part of the charge across the mould surface, the forming roller presses the inner layer of the charge against the mould surface, and the second bend moves towards the free edge. clamping a first part of the charge with a clamp, a free part of the charge protruding from the clamp to a free edge; contacting the free part of the charge with a forming roller; and advancing the forming roller across a die so that it bends the free part of the charge over a convex corner of the die, wherein as the forming roller advances across the die it rotates about an axis of rotation which also advances across the die, and wherein the charge comprises an outer layer and an inner layer, the plurality of layers of fibre-reinforced material are positioned between the inner and outer layers, and the forming roller forms a first bend with the outer layer on the outside of the first bend as it bends the free part of the charge over the convex corner of the die, wherein as the forming roller advances across the die it presses the free part of the charge against a mould surface of the die, and in that the method further comprises: contacting the inner layer with a guide; bending the free part of the charge away from the mould surface of the die to form a second bend with the inner layer on an outside of the second bend; and simultaneously advancing the forming roller and the guide across the die so that they progressively draw the free part of the charge across the mould surface, the forming roller presses the inner layer of the charge against the mould surface, and the second bend moves towards the free edge. contacting the inner layer with a guide; bending the free part of the charge away from the mould surface of the die to form a second bend with the inner layer on an outside of the second bend; and simultaneously advancing the forming roller and the guide across the die so that they progressively draw the free part of the charge across the mould surface, the forming roller presses the inner layer of the charge against the mould surface, and the second bend moves towards the free edge.