I was re-watching the video from CGP Grey about the City of London.
In the video he says:
The City of London also has a representative in Parliament, The Remembrancer, whose job is to protects the City's special rights.
Because of this, laws passed by Parliament sometimes don't apply to the City of London: most notably voting reforms.
But the article from Wikipedia says:
The parliamentary office is responsible for looking after the City of London's interests in Parliament with regard to all public legislation [...]
The Remembrancer is a Parliamentary agent and so can observe House of Commons proceedings from the under-gallery facing the Speaker's chair. However, that does not give the ability to participate in or influence the proceedings.
The Corporation in general, and the Remembrancer in particular, have no power to overrule Parliament, which has the right to make legislation affecting the City. For example, the Corporation needed to request a private Act of Parliament in 2002 to modernise its system of local elections; the Act notes, "The objects of this Act cannot be attained without the authority of Parliament".
So I am a little bit confused. What can the Remembrancer actually do? (and what can't they do?)