I'm still trying to submit my return, and have been since 10:00am this morning. I have now just started getting the following message:
Online Service temporarily unavailable
We are sorry but the service is currently unavailable.
Further information is provided.
We apologise for any inconvenience that this may cause."
Will HMRC be extending the deadline further one wonders....? HMRC appears to be pretending that all is now well with the service - looks a bit like a cover up to me...