Eurostar lounge in London St Pancras

After weeks I finally had a chance to use the Eurostar Carte Blanche. I arrived at St. Pancras 30 minutes in advance. No line at check-in, security and immigration, and here I am. Access to the Business Lounge is granted just by showing the Eurostar Carte Blanche even when traveling on a cheap and non refundable fare in standard class. The lounge is a long and stretched hall with armchairs, tables and a self-service bar very similar to airline lounges. The bar provides soft drinks, wine and beer, fresh sandwhiches, fresh fruits, snack food like peanuts, mini sausages and crackers. I noticed stairs going up but I didn’t have time to investigate if there is a second floor. It was quite busy.