New cellar ceiling - insulate? Air brick?

[Iyaman2024]

Hello!

I had my lath and plaster ceiling taken down a couple of weeks ago. I am planning on plasterboarding soon.

I'm wondering if there is anything that I need to do while I have access to the area that is soon to be covered.

The electrician has already been in to tidy away the wires and run new wiring for lighting.

Is it advisable to insulate before plastering to benefit the floor above? Will I need air bricks?

The cellar window was previously blocked up from the outside but when the weather is good, I scotched it open for ventilation.

Thanks, everyone!