By Charlie Conchie Fintech ‘unicorn’ the Bank of London has announced a £42m injection of funding today after a tumultuous week in which it was hit with a winding-up order and revealed its chief executive was stepping down. In a statement, the specialist clearing bank, one of only two to be created in the UK in the past 250 years, said the new capital was raised in August and would fund its “next phase of growth”. Luxembourg-based investor Mangrove Capital Partners led the round, the company said. It comes after the bank surprised the City on Tuesday with the announcement its founder and chief…