Need help on setting up

We are very new to caravaning and to be honest we are three trips under our belt now and I wished we had done this years ago.

My question is a simple one, I have a full awning and a porch awning and I have noticed that I have rails on both sides of my van, could I errect my full awning on the normal side and attach my porch awning to the same side as my car?

I have measured out the pitch and it would physically fit but is this allowed?