British shares slip as Middle East concerns overshadow trade

(Reuters) - Britain's FTSE 100 closed 0.6% lower on Monday with financial stocks leading the losses on concerns over tensions in the Middle East, although oil-fuelled gains for Shell and BP provided some support.And the FTSE 250 fell 1% after President Donald Trump threatened sanctions against Iraq and retaliation against Iran if it responded with force to last week's U.S. air strike.Apart from energy-related shares , which were lifted by oil price gains, all others closed lower.U.S.-Iran..