Nov 26, 2015 - 6:55 AM
The website uk.voyages-sncf.com offers a 50% discount on train tickets (not passes!), but only from 2 PM to 4 PM GMT tomorrow (November 27). You need the promo code "BIGFLASH" to get the discount.
Please see uk.voyages-sncf.com/en/deals/flas h-sales-promo-codes for details.
Note that you need to spend at least GBP 50. This promo only applies for tickets you will use before January 18, 2016.