The FTSE 100 Index decreased 19 points or 0.17 percent on Thursday to close at 10890 points. The decline was led by Rentokil Initial (-21.00%), London Stock Exchange (-7.08%) and Relx (-6.73%). On the upside, the strongest performers were Rolls-Royce (5.66%), Antofagasta (4.37%) and Halma (4.05%).