Calls and SMSs to and from mobile SIMs on our SIP2SIM service are failing. This has been reported to the mobile carrier who are now investigating. This looks like a similar problem that occurred last month: https://aastatus.net/2519 Updates to follow.
From our carrier: "BT have confirmed that there was an outage on one of their nodes, affecting links with Telefonica. The issue has been resolved and connections are starting to restore. BT have confirmed that all links are now back in service."