Oil majors, banks lead FTSE 100; Greene King soars on M&A

(Reuters) - London's FTSE 100 bagged gains on Monday led by oil majors and Asia-exposed banks that rose on moves by China to keep business interest rates low, while pub operator Greene King helped midcaps outshine after agreeing to be bought out.The FTSE 100 added 1%, its biggest one-day rise in more than 10 days, but a 50% surge in Greene King shares helped the FTSE 250 index outperform with a 1.5% rise. Shell and BP jumped roughly 2%, tracking a surge in crude prices following a drone..