Sorry it took so long to finish this. I spend a lot of time learning how to draft and sew the pockets.
This is a step-up from basic toiles. I sew a complete zipper fly, pocket with bags, welt etc.
My sources:
ESMOD Fashion Detail Vol 1 "Assembly procedures - Women Trousers" (p153)
ESMOD Fashion Detail Vol 2 "Pocket in a seam" (p85)
ESMOD Fashion Detail Vol 3 "Trouser fly zipper with separate fly tab" (p27)
ESMOD Fashion Detail Vol 3 "Fitted Felled Waistband" (p68)
ESMOD Fashion Detail Vol 3 "Waistband with belt loops" (p84)
How To Sew Single Welt Pocket Neatly Step By Step For Beginners by Thuy Sewing
I cannot find a proper instruction on how to sew single welt pocket for pants in ESMOD book. There is instruction for single welt pocket in the book, but probably only suitable for shirt and jacket, not for pants because the pocket bag does not extend up to the waistband.
You can download all the files here. The pattern is specifically drafted to fit my manikin, which has hip circumference 92 cm and waist circumference 63 cm.