BTCC

BTCC was a United Kingdom based bitcoin exchange that was once the world's second largest by volume in October 2014

BTCC (formerly Bitcoin China) is a United Kingdom-based bitcoin exchange that was once the world's second largest by volume in October 2014. Founded in June 2011 as BTCChina, it was China's first bitcoin exchange, and most of its customers are thought to be from the domestic market. from Wikipedia