You are just waiting for the last steps, you will be getting it soon.
This is what their email from yesterday says: "Thank you for your email. This file is currently in transit from London Mission. Once we receive the file, it will be in queue for processing."
ECAS says we started processing on November 23, 2018. So I don't even know what to believe right now. An immigration consultant today said if their email is what is says then we are looking at another 6 to 8 months as the queue at Colombo visa office is quite busy.
On the other hand when my MP called last week they said they were verifying a medical note and the travel information we had sent voluntarily.
So I don't know if they have or haven't started processing it yet. The email suggests they haven't yet.