Stamps inscribed Guernsey Alderney overprinted for the 1971 Postal Strike
The 1971 United Kingdom postal workers strike was a strike in the United Kingdom by postal workers between January and March 1971
The strike overlapped with the introduction of decimal currency in the U.K
A range of officially licenced and unlicenced private posts operated during the strike to fill the gap left by the withdrawal of official postal services. Some were genuine commercial services that provided local, national and international deliveries, but many were set up by stamp collectors and stamp dealers to provide philatelic material for collectors.