Britain’s increasingly fractious relationship with Brussels is showing up in a predictable place. The European Union could restrict euro clearing in London, the Financial Times reported on Monday. It’s a timely reminder of the risks to the United Kingdom of breezily accepting a so-called hard Brexit. Britain and the EU have for years bickered about control of clearing houses – the financial utilities that stand between counterparties on derivatives trades and provide protection in the event that a trader goes bust. Of the $762 billion of euro-denominated derivatives cleared daily, three-quarters currently occurs in London, according to Bank for International