Update at 11.15am:

We are pleased to update that our engineers have resolved the service performance issues. All cloud services are now fully operational.

Ex Libris have reported that they are experiencing issues with Summon at the moment:

We are investigating performance issues with our cloud services.

We are doing everything we can in order to solve the issue as soon as possible. We will provide timely updates on this

Summon seems to be working intermittently for now – we’ll report back when Ex Libris have confirmed that it’s fixed.