Along with its sister papers The Observer and the Guardian Weekly , The Guardian is part of the Guardian Media Group , owned by the Scott Trust .
It was known from 1821 until 1959 as the Manchester Guardian .
Along with Manchester Guardian 's sister papers The Observer and the Guardian Weekly , Manchester Guardian   Manchester Guardian part of the Guardian Media Group , owned by the Scott Trust .
It was known from 1821 until 1959 as the Manchester Guardian .