Sandwich€Vieux-LilleMon-Wed 12:00-00:00; Thu-Sat 12:00-01:00; closed Sunday
Costaud on Place du Vieux Marché aux Chevaux in Lille builds sandwiches to order by day and turns to shared plates at night, across three floors.
Why locals love it: Three floors of a 19th-century building on a small square off the main Vieux-Lille circuit, sandwiches by day and shared plates at night.
Tip: The square it sits on is one street off the tourist route, which is why it stays a local room.
Vietnamese€Vieux-LilleMon-Fri 12:00-14:00 and 19:00-21:00; Sat 12:00-14:30 and 19:00-21:30; Sun 19:00-21:00
Smokey Banh Mi on Avenue du Peuple Belge in Lille smokes its own meat and buys its bread from the Degruson bakery up the road in Vieux-Lille.
Why locals love it: Meat smoked on the premises and bread bought from the Degruson bakery up the road, which is why an 11.50 euro sandwich has a following.
Tip: Ask what has been in the smoker that day. The pork is the constant, the rest rotates.
Bistro€Vieux-LilleMon-Fri 12:00-14:30; Sat 12:00-15:00; closed Sunday
Bernard et Léon on Rue de la Clef in Lille is a bowl canteen named for the founders' two grandfathers, open at lunch only and priced under 16 euros.
Why locals love it: A lunch-only canteen on Rue de la Clef whose bowls are named after the founders' own grandfathers, Bernard and Leon.
Tip: Lunch only, and it shuts at 14:30 on weekdays. Saturday runs half an hour later.
French regional€€Vieux-LilleMon-Sat, lunch and dinner service; closed Sunday
Chez la Vieille on Rue de Gand in Lille is the maroilles house of the strip, a cluttered estaminet where the cheese turns up in almost every course.
Why locals love it: A cluttered maroilles house on the historic Rue de Gand, with a summer terrace looking straight at the Porte de Gand.
Tip: Reservations are essential in the evening. The room fills with regulars before the visitors arrive.
French regional€€Vieux-LilleDaily 12:00-14:00 and 19:00-22:00
Au Vieux de la Vieille spills onto the cobbles of Rue des Vieux Murs in Lille, the terrace estaminet locals send visitors to for carbonade and welsh.
Why locals love it: It sits on the tiny Place aux Oignons rather than the main circuit, which keeps the terrace calm on a busy Saturday.
Tip: Take the terrace on Place aux Oignons rather than a table inside. It is the quieter side.
French regional€€Lille-CentreMon-Sat 12:00-14:00 and 19:00-22:00; closed Sunday
Le Barbu d'Anvers is a 130-seat Maître Restaurateur estaminet near Rihour in Lille, serving northern regional cooking across three panelled rooms.
Why locals love it: A 130-seat Maitre Restaurateur estaminet that long-time Lillois keep returning to, hidden a street back from Rihour.
Tip: Service is fast even when the room is full, which is why the lunchtime regulars keep coming back.