When you enter Latino market, you can go to the left to a restaurant area. And they serve amazing…read morefood, in huge portions, for ridiculously cheap prices!
There's no comprehensive menu posted; I recommend you check out the online menu before you go (http://www.latinomarketlondon.com/menu.html). When I asked if they had a menu, they asked me what sort of food I wanted (I knew what to order, cause I'd scoped it out ahead of time.) People who came in after (and didn't know what they wanted) were given a printed menu, though, so you should be able to ask for one.
You can get 3 tacos for $5, or a burrito for $6. You can also find an array of Columbian specialties. I tried the bandeja paisa ($12), which is a traditional platter including rice and beans, a sausage, fried pork belly, some shredded beef, a slice of avocado, a fried egg, a cooked plantain, and a small arepa (which is like a thick corn tortilla). All of the food was fantastic, and the portion was massive. The sausage in particular was delicious, and the beans were nicely seasoned.
I also ordered a couple of empanadas and carimañolas (I was splitting all of this food with someone, I swear!) The empanadas (fried turnovers filled with seasoned beef) were out of this world -- although they were VERY salty (I was guzzling water for the rest of the day.) The carimañolas were yucca/cassava dumplings filled with cheese, and they were absolutely scrumptious; I could eat those things all day. I recommend microwaving them for a few seconds to get the cheese melty.
They also serve other Columbian specialties, like arepas stuffed with all sorts of delicious things. I'll be back to try them, for sure!
There are a few tables for dining in, but most people seem to get their food to go. I speak enough Spanish to order food, but you shouldn't have a problem ordering if you don't speak any Spanish.
For just the food counter, I'd give a solid 5 stars. Latino Market also sells specialty groceries for a variety of Latin American cuisines. There's no fresh produce, but you can find cheeses, lots of canned and jarred stuff, dried chilis, masa, lots of packaged cookies and other sweets, and more. You can also get a big pack of corn tortillas for $2.10! (The tortillas are in a side fridge and the price isn't marked.) Unfortunately, the prices on most of the other groceries are higher than what you'd pay in a bigger grocery store (although I might be spoiled, having moved from L.A. where it's easy to find these sorts of groceries for cheap.)
Due to the prices, I'd only come here for groceries if you were searching for an ingredient you couldn't easily get elsewhere. But I'll definitely recommend Latino Market for the amazing Columbian food!