1 To make the gusset, cut two 7cm x 48cm rectangles from both canvas and lining fabric. Lay one lining strip horizontally, face up on a flat surface. Place a zip face up on top, aligning the bottom edges of the zip and fabric. Place one canvas strip face down on top of the zip, again lining up both bottom edges.

2 Use a zipper foot to machine stitch the three layers together, 5mm from the teeth of the zip. Unfold the layers so the fabrics lay right sides out and the zip sits along the top. Press and topstitch 2mm from the seam. Sew the two other print and lining strips to the other edge of the fastening in the same way. Zig zag stitch the long outer edges on each side.

3 Cut two 6cm x 10cm pieces of canvas print. Fold them in half widthways, right sides together, and sew down both sides. Turn out and pin the raw edges to each end of the zip so the fabric forms a tab. Stitch along the raw edges to secure.

4 For the side panels, cut two 12cm x 35cm rectangles from both canvas and lining fabrics. Sandwich one short end of the zip gusset between an inner and outer piece, right sides facing, in the same way as the zip was positioned. Make two small pleats in the end of the zip gusset to

5 While the zip is sandwiched between the outer and lining pieces, pin the long sides together and stitch 5mm from the edges, taking care not to ca