What to do with these window reveals?

[markyyyyyy]

Before my windows were installed I had this awful pvc stuck around window frame so I removed it and half the plaster came off with it, so I removed it all back to brick and I’m left with this

How do I deal with this - without plastering the whole wall aswell! Will I need new external angle beads?

Cheers

 

[Swwils]

Put on an insulated plasterboard, yes you'll need a new corner bead.

You'll be able to get it nice and square easily since you have a window to go off one end and the other side a entire wall.

 

[markyyyyyy]

Put on an insulated plasterboard, yes you'll need a new corner bead.

You'll be able to get it nice and square easily since you have a window to go off one end and the other side an entire wall.

Thanks for your reply

If I put a corner bead on how will it effect the currnt plaster on the wall?

Can I just feather it in to the existing plaster on the wall?

What thickness insulated PB is best?

Would I cut away the existing corner bead with tin snips? Or just board over it?