Not just "free speech" mind you, though it's certainly covered, but he goes into discussions about how the broader culture needs to change to have more people understanding that every point of view deserves to be expressed.
Note that while Section 5 itself did get repealed, as Atkinson says that's only one small step. Clearly the once-free citizenry under Her Majesty's Government of Great Britain and Northern Ireland still have a long long long road ahead...