U.K. stocks sprang higher Tuesday, as broad-based gains pushed the benchmark FTSE 100 toward its strongest gain in more than a month. rose 1.6% to 6,241.90, cruising toward its biggest percentage gain since a 2.8% leap on Oct. 5. British blue chips were tracking a rise in other European equity markets, with the moves coming after a rally on Wall Street Monday that saw the Dow Jones Industrial Average Its shares climbed 10% after the engineering company on Tuesday backed its fiscal 2016 forecast.