Cut all shelf pieces to length. Glue and nail quad beading 2mm back from front edge of each shelf, to make a quirk that gives shape to the joint. Tap nails home, then finish cleanly with a nail punch.
Measure 200mm across top of one shelf side from back, and join mark to bottom front corner. Cut to shape. Then, from bottom back corner, measure 350mm along bottom edge and 300mm up the back edge. Join marks, and cut off bottom triangle, to form a 5-sided truncated wedge shape. Repeat to make an identical second side.
Measure 100, 400, 700, 1000 and 1300mm up back edge. Using a protractor, set a sliding bevel to 55° and draw in lines to mark tops of 5 shelves. Use a straight edge to extend lines to front edge.
Mark a parallel angled line 10mm under each shelf top line and drill 4.5mm clearance holes 50 and 240mm from the front edge.
Clamp 1 shelf side to bench so front edge overhangs, allowing you to access front screw holes. Glue and screw top shelf to side so front edge of shelf is about 5mm back from front edge of side. Make sure bead is right way up. Repeat until all shelves are attached by 1 screw, then turn side around so back screw holes are accessible, clamp and screw on from underside so that each shelf has 2 screws on one side.
Glue and screw second side on tops of shelves. Align each shelf with lines and gap to front edge, and fix first screw in each shelf. Then go back and put in final screws.
Most shoes will be happily supported by the front bead, but you might have a few pairs that need a stop to support the heels. On 1 or more shelves, you can add a simple heel stop about 150-180mm up the shelf from the bottom. Pin in place with 30mm nails.
Fill all screw holes with timber filler. Allow to dry, then sand smooth. Paint with a coat of primer sealer undercoat. When dry, apply 2 coats of gloss enamel in the colour of your choice using a foam roller. Now your leaning shelf is complete.