"Given that neither country has a constitution or a guarantee of free speech, there is nothing to wonder at, apart from how much freedom you do actually have."
The Germans would be surprised that they "have no constitution" because, well, they do...https://www.btg-bestellservice.de/pdf/80201000.pdf please note article 5 in particular :
[Freedom of expression, arts and sciences]
(1) Every person shall have the right freely to express and disseminate his opinions in speech, writing and pictures, and to inform himself without hindrance from generally accessible sources. Freedom of the press and freedom of reporting by means of broadcasts and films shall be guaranteed. There shall be no censorship.
(2) These rights shall find their limits in the provisions of general laws, in provisions for the protection of young persons, and in the right to personal honour.
(3) Arts and sciences, research and teaching shall be free. The freedom of teaching shall not release any person from allegiance to the constitution.
The UK's constitution is less formally documented but the ECHR has been part of statute law since 1998