The outside leg notches on the front leg are 1cm higher than on the back leg (corrected August 2019).
The original instructions failed to indicate that an element of easing is required when stitching the inside legs together (corrected August 2019).
The original pocket markings were generally considered too low - they were raised in February 2018.
In the printed instruction booklet, there is a step missing at the start of section 5: Attach the Welts. The image below shows the missing step. Once you have completed section 4, follow the instructions below and then complete section 5.