Adventages of the UK joined in the EU

To Britain,  joined the EU can get the following benefits:
1 The EU provides a market of 3.4 billion population to the UK.  This market is biggerthan  American.The Uk companies can use this market to obtain more profit in global market.
2 Have important political interests. European collaboration initially advocates ultimate aim is some form of political unity. Western Europe speak with one voice can increase UK‘s negotiations weight when it negotiates other countries (mainly the United States). In addition, defense forces and strategic integration.It will provide greater security with members.