Google App Engine Down

For approximately an hour from 21:30GMT on 5th May the Google App Engine was down. This may have caused migrations to fail due to not being able to contact our server. If you have had any migrations fail during this period, please now retry them, now that the App Engine is back up.

Update: 22:40GMT Google App Engine is down again – further updates will be provided as and when the situation changes.

Update: 22:55GMT Back up, hopefully for good!