The world's oldest emergency service, 999, turns 80 years old today and many people are thanking call handlers for their work.
When the service started in 1937, it handled more than 1,000 calls in its first week, according to Sky News.
Now BT says the service receives roughly 560,000 calls each week in the UK. The busiest times for the service are usually around midnight on Fridays and Saturdays, when the service takes about 5,000 calls an hour.
Despite this, 97 per cent of calls are answered within five seconds.
The amazing work call handlers do has been praised on Twitter today, as many people thank them for their work and mark 80 years of the service.
See the reaction below