Two hours ago I just flowed off the Eurostar riding in some sort of 'enhanced coach'. It was 82 euros one way vs 62 euros (buying a London-Paris rt) in regular coach. It had a 3 course meal, initial champagne and 2-3 mini bottles of vg wine then coffee. Seating was 1 and 2 vs 2 and 2 in the crowded coach cars. I asked 3-4 Eurostar employees what it was called but I got varying answers. Whatever you do, do this for the extra 20 euros. I bought it at
www.eurostar.com . Good luck.
MisterNice