Brent crude traded in London dropped for the second straight session on Wednesday after production of OPEC rose in April to the highest level in 5 months, when it grew by 194,000 barrels a day and as U.S. inventories gained first time in 3 weeks. June Brent futures slipped $1.83 to $100.54 a barrel on London's ICE and were traded at $100.58 as of 1:21 p.m. London time.