Contrary to popular belief (or perhaps we should say stereotype), you can indeed eat well during your trip to London. From cheap takeaway pasties or chips, to fine dining establishments that specialize in fresh, organic, and local ingredients (as part of the Modern English movement that has gripped the culinary arts), to internationally popular ethnic foods, the country today offers a little bit of everything, particularly in London or other metropolises where you would naturally expect a bit more diversity.
Taxes & Tipping -- All restaurants and cafes are required to display the prices of their food and drink in a place visible from outside. Charges for service, as well as any minimums or cover charges, must also be made clear. The prices shown must include 17.5% VAT, the so-called "value-added" tax. Most restaurants add a 15% service charge to your bill, but check to make sure. If nothing has been added, leave a 10% to 15% tip. It is by no means considered rude to tip, so feel free to leave something extra if service was good.
