[zzbn00]

This is a good and subtle point of law -- The City of London is a corporation "by prescription".

But while it was created by neither statue nor royal charter, I doubt the parliament could not end it if it so decided....

[surfingdino]

That's why the City has the Remembrancer https://en.wikipedia.org/wiki/City_Remembrancer taking care of the City's business in the Parliament.