Tom just posted a new work project on Twitter w a brand new video!! Speculation is that this is a teaser trailer for a new TV adaptation of the lauded Harold Pinter play Betrayal. That is currently unconfirmed, but Hiddleston did wear this suit, while appearing at a London gala honouring Pinter just last month.
https://www.pedestrian.tv/entertainment/tom-hiddleston-betrayal-twitter-clip-speculation/