KGVI 1948 Royal Silver Wedding stamps?

The dreadful hardships 1947 brought to our islands had begun with a 51-day freeze-up that commenced on 18 January; merging into February blizzards, March snow drifts (some more than ten feet deep even in urban areas), and April floods caused by torrential rainstorms that overwhelmed many river defences.

Throughout those hellish months postal workers battled to keep Britain’s mail deliveries moving via road, rail and arduous door-to-door deliveries. Optimistically politicians promised spring-time relief; instead May brought bread, potato and petrol