By David Milliken LONDON (Reuters) – The Bank of England will probably need to raise interest rates much more sharply than financial markets expect to get soaring inflation under control, former policymakers said on Wednesday. The BoE’s Monetary Policy Committee (MPC) has raised its key interest rate four times since December to 1% – the highest level since 2009 – but still expects inflation to exceed 10% by the end of this year. “In my view the nominal interest rate – the short-term interest rate the MPC controls – will have to go up at least 250 to 300 basis points from here,” Adam Posen, wh…