I'm going to sack my special needs kitchen porter
Why do you want to sack your porter?
Several reasons. He complains a lot about me being unfair, he has hurt my feelings and he's a bad loser.
I understand that you have issues with your kitchen porter, however, it is rude to call him a loser. Keep your criticism to yourself about others.
I'm going to sack him because I'm the owner and no one has a say into what I do.
You have that right, but if you start calling him names he can sue you for unlawful termination. Keep it professional if you want to fire him.