HC Deb 11 February 1943 vol 386 c1436
36. Mr. W. H. Green

asked the Home Secretary the number of persons detained under Regulation 18B, and the number of enemy aliens detained as at 1st January, 1941, and 1st January, 1943?

Mr. H. Morrison

The number of persons detained under Defence Regulation 18B on the dates mentioned was 1,089 and 486 respectively. As regards aliens of enemy nationality (including not only Germans and Austrians, but the nationals of all States which are at war with His Majesty) the number of persons interned under the Royal Prerogative whose release had not been authorised was respectively 17,940 and 6,123.