HC Deb 10 June 1941 vol 372 c41W
Mr. Mander

asked the Minister of Information how many letters from Nazi leaders in Germany to persons in this country have been stopped by the censorship during the war?

Mr. Nicolson

I am sure my hon. Friend will realise it is contrary to the public interest to answer questions relating to the operations of the postal censorship which, by their nature, must be treated as secret.