Eurostar is currently offering returns from London St Pancras to Paris Gare du Nord, Lille-Europe, Calais-Fréthun and Brussels-Midi for just £59, and return tickets to anywhere in Belgium for £69. No Eurostar promotional code is required for the sale rates.
You need to book by the end of 14 January 2015, and travel between 19 January and 25 March 2015 (excluding 13 to 23 February, 27 February to 1 March and 20 to 22 March inclusive).
Availability of this extra-low fare is currently very good, and very easy to search for – here’s an example booking for a weekend in March:
Given that the lowest price for a return outside of this sale is £69, and prices can go as high as £309 return, this is a potentially very good deal. There’s no Eurostar promotional code for this sale – discounted prices will be available automatically.
Returns in Standard Premier are available at £159 to Paris Lille, Calais and Brussel, or £175 to anywhere in Belgium.
Full terms and conditions are available here.