On Thursday evening, a speech by Labour leader Jeremy Corbyn rattled investors after he said he was a 'threat' to big banks.
High street bank Barclays (BARC) fell 1.6% to 190.3p, while Lloyds (LLOY) and Standard Chartered (STAN) declined by up to 1.3% apiece.
Royal Bank of Scotland (RBS) announced it plans to close a quarter of its UK branches and cut 680 jobs. The high street bank said it was closing a large number of branches as more people chose to do their banking online instead of in-store. Shares in Royal Bank of Scotland retreated 1.2% to 273.2p.