LONDON -- Welcome to Britain! The line forms to the right. Here are some tips for Olympic visitors hoping to get the most out of their experience.

When in doubt, queue.

For many visitors, their first experience of the great British tradition of lining up will be at Heathrow Airport. Europe’s busiest air hub has been making headlines over the past few months for its long waits at immigration. Officials promise the problem has been fixed for the games, but – fear not – visitors will have plenty of other opportunities to stand in line at post offices, bus stops, subway stations and the entrances to the Olympic Park.

British lines are usually orderly, often elaborate and full of gallows humor. Be patient and don’t try to barge ahead – all attempts at queue-jumping will be met by glares and furious tut-tutting.

Don’t like the weather? Wait five minutes.

Britain is an island nation – “this precious stone set in the silver sea,” as Shakespeare put it.

Silver, but also stormy. The country’s famously fickle climate has caused pre-Olympic misery, as the wettest June and early July on record caused floods, disrupted transit and forced the cancellation of sports events.

This week, sun and heat have appeared, causing heat-buckled pavements and trains delayed by overheated rails.

Britons have learned to cheerfully accept that all forms of weather are bad news. It’s best to prepare for the worst and treat the weather as a useful conversation-starter – though once on the topic, many Britons find it hard to stop.

And heed the advice of Olympics chief Sebastian Coe: “People do need to be wearing the right footwear, the right rain-proof clothing – and sunscreen.”

Drive on the left, stand on the right.

British cars drive on the left, which can provide a potentially lethal surprise to visitors not from Australia, Japan, or the other handful of countries that do the same. When walking, remember your mother’s advice and look both ways before you cross the street.

In London Underground stations, the same rule applies: keep left while moving. This is especially important on escalators – nothing annoys commuters more than tourists blocking their progress. If you remember only one thing about London etiquette, let it be this: stand on the right side of the escalator, walk on the left.

Get a round in.

Britons take great pride in their sense of fair play. Many visitors will encounter it in pubs, where each member of a group is expected to take a turn buying a round of drinks for everyone. Buying a drink only for yourself is considered exceptionally rude.

Tip modestly.

American visitors are advised to pare back the amount they tip for services in Britain. In restaurants, it’s customary to add 10-15 percent to the bill. In pubs where you order and pay at the bar, tipping is unnecessary.

Many locals do not tip taxi drivers – although visitors will find that London’s famous cabbies possess a detailed knowledge of the city that often comes in handy. Any tip will be gratefully received.

Accept slimmed-down portions.

Like tips, restaurant portion sizes are often smaller in Britain than in the United States and some other countries. Two U.S. diners at London’s Oxo Tower restaurant were recently heard remarking about their tiny portions and the sizable prices.