RBS faces a $13bn bill in the US to resolve claims it misled purchasers of mortgage-backed securities, more than analysts had expected, writes the Financial Times.Ofcom has fined UK mobile phone operator EE £1m as a punishment for its poor customer services record, The Times writes.US health insurer Aetna is close to buying Humana in a deal worth $34bn with an announcement possible before the weekend, according to The Wall Street Journal. Aetna is expected to pay $230 a share, a 23% premium on Thursday's close.Greek banks are down to €500m in cash reserves as the daily allowance of cash from ATMs drops from €60 to €50, The Telegraph reports.German discount grocer Lidl and its sister chain Kaufland have benefited from nearly $900m in public development funding over the past 10 years, according to The Guardian. They received loan funding from the World Bank and European Bank for Reconstruction and Development.The Financial Conduct Authority has handed out pay rises to more than a thousand staff but omitted to raise their pension contributions by the right amount, reports The Times.