I should have pointed out that there is no requirement for either of us to attend the D hearing. And indeed, on his application, stbx indicated he would not be present.
So, we will be sitting together in another office, sort of 'disregarding' the fact that the D is happening as we speak.
Only for me, though.
For him, the M has been over for years.
It's all just about what you tell yourself, I suppose.