When in Rome, do as the Romans do. Here are some British etiquette (礼仪) and customs international students ought to know.
Visiting
In most houses in Britain, the doors are usually kept closed. It is customary to visit people at a pre-arranged time and day. Usually, people are not comfortable if you just drop in. Nevertheless, if someone says to drop in at any time, feel free to do so as long as it is not in the middle of the night. When you go into someone's house, do take your hat off (men only). It is impolite for men to wear hats indoors especially in churches.
Greeting
In Britain, the handshake is a common form of greeting. When you meet people for the first time, it is normal to shake hands. A firm handshake is the norm (标准); there are no issues over gender in Britain. The usual formal greeting is ''How do you do? '' and a firm hand shake, but with a lighter touch between men and women. In Britain, unlike some other European countries, it is unusual to embrace or kiss the other person (unless they are family or a very close friend).
Gifts
During birthday and Christmas celebrations, it is common for the British to exchange gifts between family members and close friends. The gift doesn't need to be expensive, but it should usually show an attempt to find something that is related to the recipient's (接受者) interests. When invited to someone's home, it is normal to take along a box of good chocolates, a bottle of good wine or a bunch of beautiful flowers. Note that gifts are opened when received.
Punctuality
The British are generally punctual (守时的), especially the scots. The British consider it impolite if you turn up late for an appointment. In most cases, the people you are meeting will be on time, call even if you will be 5 minutes later than you've promised. If you have been late or fail to keep your appointment, make an effort to contact the person to let them know. It is a good idea to telephone and offer your apologies.