How to make Junky Styling's fly top

1. Take a pair of trousers and a stretchy T-shirt or vest. Hold the waistband of the trousers against your shoulders to check for size. Fold the trousers in half so that the back pockets are flat against each other and the fly is on the edge of the fold. Photograph: Ness Sherry/Junky Styling: wardrobe surgery

2. Cut across from the crotch point (just below the fly) straight out to the side. Cut through all layers and make sure the pockets are clear of the cut lines. You may want to straighten out the curve of the crotch seam under the fly by sewing straight down. Photograph: Ness Sherry/Junky Styling: wardrobe surgery

3. Still folded in half, cut armholes at the side where the pockets are. Cut through any pockets.

4. Cut your vest or T-shirt straight across the back and chest under the armholes. Cut through front and back simultaneously.

5. Attach the stretchy section to the bottom of your trouser section, with the raw edges on the inside. Sew this together with the stretchy side on top as you sew, stretching the top to fit. Photograph: Ness Sherry/Junky Styling: wardrobe surgery

6. For the trim on the armholes, cut two strips of the remaining off-cuts of the T-shirt or vest. Make these strips a bit longer than half the length of the armhole (when laid out flat) and 5cm wide. Sew together the 5cm widths on each strip, creating two circles. Fold these halfway in all the way round, creating two complete circles with a folded edge (this is a raw edge). Attach these to the armholes, raw edges to the inside of the garment and folded edges to the outside. Keep the pockets flat and in place as you stitch on the armhole trim. Photograph: Ness Sherry/Junky Styling: wardrobe surgery