In London, it's dining that can do in your budget. Dodge the best restaurants, and you should be fine.

Below, find our suggestions for reasonably priced eats and not-to-be missed freebies.

* Fifteen: Located between the financial district of The City and up-and-coming Clerkenwell, Fifteen offers training scholarships to troubled kids, who take classes and food-related trips and work in Fifteen's kitchen - and can end up with a scholarship-support post abroad. Though superchef Jamie Oliver doesn't own the place, he did start it and keeps a hand in it. The regional cuisine justifies the months-long waiting list; the day we visited, lunch items included carpaccio of buccleuch beef hung for 21 days, a leg of pork pot-roasted in milk, Sicilian fisherman's stew and a selection of artisan cheese. You can drop in for breakfast or lunch at the casual (and less expensive) Trattoria upstairs, or book for lunch or dinner in the main restaurant. A three-course fixed-price lunch is a bargain at 25 pounds (about $50), but you'll have to resist the temptations of the regular menu, where entrees start at around 20 pounds. Proceeds go to the Fifteen Foundation. (011-44-870) 442-2470; www.fifteenrestaurant.com. * Salvation Army Cafés: Honest, tasty soups and fresh sandwiches at a bargain price are the mission of Salvation Army's cafés near St. Paul's Cathedral, 101 Queen Victoria St., and a smaller one at 275 Oxford St. Grab your lunch, then drop a contribution in the kettle. Free lunch concerts are offered Fridays at the Oxford Street facility. Even if you're not religious, you'll be comfortable; there's no proselytizing. www.salvationarmy.org.uk. * Café in the Crypt: This crowded cafeteria is saved by the atmospheric vaults beneath the church of St. Martin in the Fields, located at Trafalgar Square. Options include hearty comfort food plus custom-made salads; a hot meal plus wine costs about 10 pounds, or about $20. Proceeds support the work of the church, perhaps best known for its classical and jazz concerts at lunch and many evenings. The café is open 8-8 Mondays-Wednesdays, 'til 10:30 p.m. Thursdays-Saturdays, noon-8 Sundays. (011-44-207) 766- 1158; www.stmartin-in-the-fields.org.