Resolved -
This incident has been resolved.
Apr 23, 17:08 BST
Update -
We have received an update stating this incident has been resolved at 14:30 BST. We will continue to monitor and post any updates here.
Apr 23, 14:41 BST
Monitoring -
We are aware of some degradation of SMS services from O2 starting at 13:07 BST. Sending and receiving of SMS, and receiving of delivery receipt may be affected or delayed. Other mobile networks that rely on the O2 infrastructure may also be affected.
GOV.UK Notify itself is fully operational. We will continue to monitor and post any updates here.
Apr 23, 14:06 BST
Investigating -
If you have sent any letters after 5:30pm yesterday 16 April up until 1:54pm today 17 April and you need to cancel any of them you'll not be able to do so by yourself as usual; please get in touch via our support form - https://www.notifications.service.gov.uk/support.
Apr 17, 14:01 BST