Copper traded in London declined on Tuesday falling for the first time in a four-day period before a report showed that consumer confidence in the U.S. slipped to a 5-month low and the Federal Reserve begins its two-day policy meeting. Copper for delivery in January decreased 0.8% to $7,135.25 a metric ton and it was at $7,181 as of 4:07 p.m. Tokyo time.