Is it ok to have a rant on here?

Wow. What a bastard.

Now would be a very good time to have a formal conversation about child access arrangements now you are separated. He needs to be solely responsible for DS on 'his' days. You and DS would then know who Isis taking him to rugby, cooking his tea etc. Don't facilitate him living the single no responsibility life.

Nah his got you ..
Didn’t give a toss
Showing his anger expect more of this.
Tell him calmly that if he knows he can’t make it he should tell you in advance..that way he can tell his son his not taking him .
So selfish

I can understand you been mighty pissed off . His son should come before his date night / morning.
He could of at least phone to say sorry he was not going to be able to make it .
I hope he makes it up to his DS in some way