Weirdly, this one takes you to a form rather than a typical SoPost page.
As ever, you can only fill it in once (per IP address, I think) or they reject it.
UK residents 18+. Entries open 9 th October 2020 until 31 st December 2020
To claim your sample fill in the online form available on a mini site that loads from clicking from a TPS banner.
5,000 of 1.2ml samples available of YSL Libre Eau de Parfum, subject to availability whilst stocks last.