M&S always used to have these slightly wide leg, stretch fabric with no crease or pleat in the front of the legs. A smooth stretch waist so no elastic, ties, buttons or zip. 3 lengths and often 3 colours, black, dark navy and dark brown.
They used to come in every year.
Has anyone seen them in store or online? I’ve hunted and hunted and can’t see the same thing, tried by garment code but no luck.