China Construction Bank Ltd, [Businesses Registration]the country's second-biggest bank, said on Thursday it has secured board approval to set up a branch in London.

Chinese banks have been gradually expanding their overseas footprints, which is seen facilitating the internationalisation of China's currency, the yuan.

London accounts for 62 percent of yuan trades outside the Chinese mainland and Hong Kong, according to data from financial services provider SWIFT.

The board approval comes after Britain relaxed rules to help overseas banks set up branches in the country. [company registration in Hong Kong, Hong Kong company incorporation] It also came on the heels of moves to make London a leading global hub for yuan trading.

The London expansion is the latest move overseas by CCB. The bank last year agreed to buy a 72 percent stake in a Brazil's Banco Industrial e Comercial SA for about $720 million.