HC Deb 02 May 1956 vol 552 c44W
Mr. Biggs-Davison

asked the Postmaster-General whether, in view of the popularity of light-blue writing paper, he will arrange for post offices to sell stamped envelopes in that shade.

Dr. Hill

Yes. Light-blue stamped envelopes will be put on sale at all post offices on 11th June. They will be square-shaped and will eventually replace the cream-coloured envelopes of that shape.