LONDON, June 9 (Reuters) - Top U.S. and Chinese officials will sit down in London on Monday for talks aimed at defusing the high-stakes trade dispute between the two superpowers that has widened in recent weeks beyond tit-for-tat tariffs to export controls over goods and components critical to global supply chains.

U.S.-China trade talks in London this week are expected to take up a series of disputes that have buffeted relations.

London's benchmark index slipped on Monday after rounding off four weeks of gains, as caution prevailed ahead of much-awaited U.S.-China talks later in the day.