Located right across the street from the London Olympia events hall, Café Del Mundo is an excellent alternative to the very high priced stalls inside. While the line can get long, the staff are able to assemble sandwiches and stuff quickly. Lots of sandwich choices and drinks too. Beers, plus a good selection of sodas including a ginger beer that was good. Sandwich(chicken tikka on a baguette), chips and a can, £4.90. Not a whole lot of seating, this is probably a good place for take-away.