HC Deb 25 February 1971 vol 812 c246W
Mr. Redmond

asked the Secretary of State for Social Services, when the postal strike is over, whether decimalised National Insurance stamps can be used for stamping insurance cards for the whole period of the strike, although some of the period occurred before decimalisation.

Mr. Dean

Yes, My Department announced in January, 1970,that after the changeover decimal stamps could be used to cover weeks before D Day and £sd stamps could be used up for weeks after D Day. This information was also conveyed in a press notice which appeared in all national newspapers on 12th February,1971.