(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * FTSE 100 down 0.3%, FTSE 250 flat Sept 7 (Reuters) - London’s FTSE 100 index edged lower on Tuesday, weighed down by banks and brokerages, while DS Smith jumped to the top of the index after an upbeat trading update. The blue-chip index fell 0.3%, with shares of banking and investment banking and brokerage services providers shedding 0.8% and 0.6%, respectively. Heavyweight oil majors BP and Royal Dutch Shell slipped about 0.4% as oil prices remained muted amid fears over slower demand. The domestically focused mid-cap FTSE 250 index was flat. DS Smith gained 3.3% as J.P.Morgan raised its price target on the cardboard maker’s stock after it said trading continued to progress well in line with the trends. TP ICAP Group Plc fell 4.6% after the world’s largest inter-dealer broker reported a lower half-year profit as market volatility eased. (Reporting by Devik Jain in Bengaluru; Editing by Saumyadeb Chakrabarty) Our Standards: The Thomson Reuters Trust Principles.