Most of the leading banks based in the UK could begin to pull-out of the country early next year because of uncertainty about Britain's exit from the EU and increasing fears over the impending Brexit negotiations.<br/><br/>British Bankers' Association chief, Anthony Browne, said smaller banks could also move operations overseas by next year. He said banking is more affected by Brexit than any other sector of the economy, both in the degree of impact and the scale of the implications.