FTSE slides; posts first monthly fall since June

* FTSE falls 1.8 pct, posts biggest weekly drop since March

* Oils, miners weighed down by weak commodity prices

* Banks reverse earlier gains as U.S. peers fall

* Selected defensives in demand as risk appetite cools

By Tricia Wright

LONDON, Oct 30 (Reuters) - Britain's top share index fell sharply on Friday, ending the month in negative territory for the first time since June, led lower by commodity stocks and banks as confidence waned after mixed U.S. data.

The FTSE 100 .FTSE closed down 93.17 points, or 1.8 percent, at 5,044.55, having risen 1.1 percent on Thursday after the release of above-forecast U.S. growth data which signalled the country had come out of recession. [ID:nN29354547]

The index fell 1.7 percent in October, the first monthly drop since June. It also had its largest weekly fall, at 3.8 percent, since March.