London's major events, ranked by crowd impact
Every event here is verified by a person, dated from its own organiser, and measured against London's day-by-day crowd forecast — so they can be ranked on one scale. See the city, day by day →
#1 Notting Hill Carnival →
Notting Hill Carnival is the busiest of London's 2 verified major events — its busiest day reads Packed, busier than 99% of London's year.
The 2026 Notting Hill Carnival in London runs 30–31 Aug 2026, confirmed; expect Packed days — busier than 99% of London's year. (Avoid-Crowds, as of 2026-08-29; recomputed nightly.)
#2 New Year's Eve fireworks →
New Year's Eve fireworks ranks #2 of London's 2 verified major events by crowd impact — its day reads Busy, busier than 73% of London's year.
The 2026 New Year's Eve fireworks in London is expected on 31 Dec 2026 — the date can move; expect Busy days — busier than 73% of London's year. (Avoid-Crowds, as of 2026-08-29; recomputed nightly.)
Disclaimer — event dates can change; expected dates are labelled and can move.