*€45 off on a single Business Premier adult fare and €90 off on a return Business Premier adult fare. Book by 25/08/2019 for travel between 01/08/2019 and 31/08/2019 inclusive. Fares are subject to availability. Blackout dates apply. Tickets are exchangeable once only before or up to 60 days after departure by paying the difference in price with the next available fare in the same class of service on the day of exchange. See eurostar.com for full Ts&Cs.