Out of interest...Metropolitan Police data........
The comparable data still stand, even with the updated data.
Number of arrests for this year' carnival - 350
Number of visitors over two days - 2,000,000
Notting Hill Carnival Arrest rate per 100,000 people - 17.5 arrests per 100,000 people.
Normal UK arrest rate per 100,000 people - 1,120 per 100,00 people.
Normal arrest rate for Black people in UK - 2,040 per 100,000 people.
The data shows that, in the year to March 2023: there were 668,979 arrests in England and Wales – a rate of 11.2 arrests for every 1,000 people.
Number of Arrest for Rio Carnival 2023 - 1,853
Number of attendees, 2,000,000 per day over 6 days = 12,000,000
Arrest Rate per 100,000 people - 15 per 100,000 people
During the Brazilian Carnival season of 2020, more than 2.4 thousand were arrested throughout the state of São Paulo.
www.statista.com
en.wikipedia.org
It's looking like carnivals are uncommonly safe spaces, in comparison with normal day to day events.