Although tipping is largely personal, some standards are customarily acceptable. In restaurants, for example, tipping ranges from 10% to 20%, with 15% being typical. Depending on the establishment, the tip may or may not be included on the bill, so make sure to check before you act. The same holds true with hotels, who often tuck gratuities into the tab.

Taxi drivers also merit 10% to 15% of the total cost (unless it's a short trip, in which case, the gratuity is more), and tour guides frequently receive £3 for their efforts. Don't, however, tip servers in pubs, and don't tip ushers in theaters. They don't expect it.

If in doubt, £1 can go a long way. It's a safe bet to present folks who carry your bags, arrange for a taxi, or bring room service.