This related back to a comment Nigel made earlier about the composition of the committee:


Who sits on [the privileges committee]?
A cross-party group of seven MPs make up the committee. They are the exact same members as sit on the standards committee, given the two used to be combined until 2010.

But unlike the standards committee, the privileges committee does not have any extra lay members – independent people who are not politicians – appointed to sit on it.


(From a Guardian 'explainer')

Given Chris Bryant recused himself, it is not clear to me at the moment whether in the case the committee will have six members, or whether a temporary replacement of Bryant will be made.