I will consider the phase space at null-infinity from the r -> infty limit of
a quasi-local phase space for a finite box with a boundary that is null. This
box will serve as a natural IR regulator. To remove the IR regulator, I will
consider a double null foliation together with an adapted Newman--Penrose null
tetrad. The limit to null infinity (on phase space) is obtained in the limit
where the boundary is sent to infinity. I will introduce various charges and
explain the role of the corresponding balance laws. The talk is based on the
paper: arXiv:2012.01889.