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1 Glue and screw the two 350mm side pieces between the ends of the 1 300mm front and back panels to make the frame for the bench.

2 Glue and screw the 1 262mm base in place inside the four sides of the frame. Screw in the 1 262mm support plank for the hinges along the top of the back panel. Measure and mark the position for the hinges – 150mm in from each side – and screw them in. Place the bench on its back next to the lid so that the latter overlaps equally on each side, then attach the hinges to the lid.

3 Drill a 9mm hole in the centre of the four 100 x 100mm blocks for the legs and knock in the T-nuts. Glue and screw a block on each corner of the base underneath the bench and turn in the legs. Fill all screw holes with wood filler and sand to a smooth finish when dry. Paint or varnish the bench in the colour or finish of your choice.