UK Stocks-Factors to watch on Nov 28

Britain's FTSE 100 index is expected to open 23 points lower at 7,407 on Thursday, according to financial bookmakers. * HSBC: HSBC aims to shift $20 billion worth of assets to a new blockchain-based custody platform by March, in one of the biggest deployments yet of the widely-hyped but still unproven technology by a global bank. * BREXIT: Britain's Dec. 12 election could well result in another parliament where no party commands a majority, Prime Minister Bor