London is 8 hours ahead of Los Angeles most of the year, and 7 hours from mid-March to late March and from late October to early November.
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Quick reference
| LOS ANGELES | LONDON · MOST OF THE YEAR | LONDON · MID-MAR–LATE MAR, LATE OCT–EARLY NOV |
|---|---|---|
| 9:00 am | 5:00 pm | 4:00 pm |
| 12:00 pm | 8:00 pm | 7:00 pm |
| 3:00 pm | 11:00 pm | 10:00 pm |
| 6:00 pm | 2:00 am next day | 1:00 am next day |
| 9:00 pm | 5:00 am next day | 4:00 am next day |
Questions
8 hours most of the year, and 7 hours from mid-March to late March and from late October to early November, when Los Angeles and London change their clocks on different dates.
5pm most of the year, and 4pm from mid-March to late March and from late October to early November.
Yes, both, on different dates. Los Angeles moves to PDT (UTC-7) in mid-March and back to PST (UTC-8) in early November; London moves to BST (UTC+1) in late March and back to GMT (UTC+0) in late October.