By Huw Jones LONDON (Reuters) -The European Union is considering ways to lower the bar on forcing foreign bank branches to become subsidiaries which must hold more costly capital and liquidity, and EU document showed. The EU is revising its capital rules for banks, including more intense scrutiny of how foreign lenders operate in the bloc after the departure of Britain following Brexit. An EU document prepared for member states and seen by Reuters said adjustments could include an “automatic trigger for subsidiarisation”, or ways to constrain the discretion that regulators have in deciding whi…