Not true. The EU is the world’s biggest single market, and it’s far and away our biggest trading partner, amounting to nearly half of our world exports. Indeed, we export more to Holland alone than to the entirety of the Commonwealth Evidence
The same applies to our imports, with European countries providing about two thirds of our incoming goods and services. Evidence
For a detailed look at British trade and how it might be affected if we left the EU, read this analysis from the think-tank Bruegel.