Part of Oral Answers to Questions — Post Office – in the House of Commons at 12:00 am on 26 October 1966.
Apart from handing franked mail over the counter, customers can put it in special envelopes, and post them in specified boxes. The amount that can be posted in this way is limited. People are supposed to use this facility for urgent matter only, and for no more items than can be enclosed in one of the special envelopes.