Imagine the laws in the US being made by a foreign country. That's exactly what's happening to the EU countries. The Brits were the ones who came up with the Magna Carta over 500 years ago and they don't like having people they never voted for controlling the laws in their country. Germany runs the EU. The EU was supposed to be a trading bloc as it was originally called the EEC and was all about tariff free trading when it first started out post WW2, not the pseudo country run by Germany that it's morphed into.
http://www.telegraph.co.uk/news/2016/05/09/it-is-an-eu-army-that-could-bring-about-war/ <---do trading blocs call for their own army?
The Brits are the second biggest contributors to the EU money wise. That means British taxpayers are helping to foot the bill for the Greeks and other failing EU economy's that tanked and the ones who benefit from those bailouts are the German bankers, not the Brits. The EU growth rate as far as trade is the most stagnant in the world atm. The Brits aren't allowed to make deals with Commonwealth countries such as Canada, Australia, New Zealand, etc... They would like to trade with those countries as well as China, India, South Africa, US, etc...
Merkel opened the doors to millions of Middle Easterners and North Africans and tried to set quotas on the rest of the EU countries in regards to taking them in. Now Germany is forcing those migrants on the rest of the EU in the form of quotas. Merkel let them in, and it should be Germany that deals with them, not the rest of the EU countries who obviously do not want them.
Luckily for the Brits they never left the Pound seeing how the Euro is being propped up atm by German bankers and is on the verge of tanking the first time Greece defaults on this latest deal. Italy isn't far behind and it's economy is on the verge of tanking also.