Los Angeles is typically 8 hours behind London. When it's 5:00 PM in London, it's 9:00 AM in Los Angeles. Both cities observe daylight saving time, though the transition dates differ slightly.
During the brief periods when the US and UK change clocks on different weekends (usually in March and November), the difference can temporarily be 7 or 9 hours. For most of the year, it's a consistent 8-hour difference.
Optimal meeting window: 6:00 AM - 9:00 AM Los Angeles time (2:00 PM - 5:00 PM London). This catches afternoon business hours in London while being early morning in LA.
Be aware that scheduling after 9:00 AM LA time means calling after 5:00 PM London time (end of business day).