Just typed a big post and lost it, argh. Summary: hot holiday, saggy flat butt = bad VPL in lightweight dresses.
Need knicker shorts, like cycling shorts but a bit shorter, full cheek coverage to prevent wobbly lower butt escapement. Spanx too restricting in the heat. G-string no.
Options: M&S, Asda, Matalan, Amazon Prime. Need to get them tomorrow.
S&B wonder women - do your thing!