By Andy Bruce LONDON (Reuters) – Promises of tax cuts from candidates to succeed British Prime Minister Boris Johnson pose another inflationary risk which could pressure the Bank of England to raise interest rates more aggressively, cancelling out any potential boost to the economy. Most of the 11 contenders, trying to portray themselves as defenders of the Conservatives’ traditional low-tax ethos, have promised to ease a tax burden which is set to hit its highest since the 1940s. With little mention of any off-setting spending cuts, the pledges mark a further departure from the era of fiscal …