This morning, Sunday, June 25, Britons are being urged to not call the emergency 999 phone number. 

It comes as the service has lost connection to a number of police forces across the UK, the Metropolitan Police reported this moring. 

The outage is being put down to a technical fault and it has not been confirmed what forces are currently being impacted. 

Instead, Brits are being told to call 101 for an emergency until further notice. 

Emergency 999 phone number not working 

In a Tweet shared by the Met Police, they said: "⚠️ Due to a technical fault that is impacting a number of police forces, many 999 calls are not connecting. 

"📞 Until further notice, please call 101 in an emergency. 

"🚫 Please ONLY call in an emergency and please wait until later to make any 101 non-emergency calls."

Other forces across the country shared the same message, including Greater Manchester Police, Bedfordshire Police and South Wales Police, the Mirror reports. 

Police services are not the only ones impacted by the outage as Lincolnshire Fire and Rescue also tweeted telling people to call 111 for a medical emergency. 

Tweeting: "URGENT - the National 999 system is experiencing issues, in case of an emergency please contact Fire on 01413 979351 - dial 101 for police and 111 for medical emergency."

It's confirmed that BT runs the 999 system.

It is not known how many emergency services have been affected, or when the issue will be resolved.