By David Milliken and Suban Abdulla LONDON (Reuters) - The Bank of England slowed the pace of its programme to run down its government bond stockpile on Thursday and skewed sales away from long-dated debt in a bid to minimise the impact on volatile gilt markets. The central bank kept its main interest rate on hold at 4% after August's quarter-percentage-point cut, as expected. The BoE bought 875 billion pounds ($1.19 trillion) of British government bonds between 2009 and 2021 to boost the economy, then ...