BBC Business News: TSB drafts in outside help to fix IT chaos  |  SSE-Npower merger could push up prices, competition body says  |  Companies sign up to pledge to cut plastic pollution  |  Barclays pushed into loss by US payout  |  UK car output slumps on poor demand  |  NASDAQ News: Nasdaq Reports First Quarter 2018 Results; Delivers Strong Growth in Revenues and Income  |  Gemini to Launch Market Surveillance Technology in Collaboration with Nasdaq  |  Nasdaq Announces Mid-Month Open Short Interest Positions in Nasdaq Stocks as of Settlement Date April 13, 2018  |  Nasdaq Announces Results from 2018 Annual Meeting of Stockholders  |  Nasdaq Halts SPI Energy Co., Ltd.  |  CNBC Economy: Chinese smartphone market plunges; Apple knocked out of China's top-4 sellers  |  Another major Apple supplier just delivered potential bad news for the iPhone X  |  Shell earnings surge as oil prices rebound  |  Revolut becomes latest fintech unicorn after funding gives its a $1.7 billion valuation  |  ECB set to hold steady this week amid slower growth  |  CNBC Investing: