HC Deb 07 June 1961 vol 641 c92W
49. Mr. Tilney

asked the Postmaster-General whether loud speaking equipment is now available for purchase by private individuals from the Post Office whereby they can carry on a multiple conversation; and what is the cost or rental of such equipment.

Miss Pike

Yes. An instrument is now available in limited quantities at a quarterly rental of £5 and an installation charge of £2.