Spanx Women's Oncore Firm Control Open-Bust Panty Bodysuit - Black - Available at M&S

Enjoy a smooth, sculpted look under form-fitting outfits with this shaping bodysuit from Spanx. Its firm fabric lifts and holds your curves for a figure-defining effect, while adjustable straps help you find your perfect fit. This piece is open at the front so you can wear it with your own bra.