Aldi is Britain's fifth-largest supermarket group after market leader Tesco TSCO.L, Sainsbury's SBRY.L, Asda and Morrisons. Adds detail LONDON, July 25 (Reuters) - German-owned discount supermarket group Aldi UK said on Monday it was awarding its store staff a second pay rise this year in another indication of Britain's tight labour market. The Bank of England is watching settlements closely as it weighs the risk that a jump in inflation to a 40-year high of 9.4% becomes embedded in the economy.