I saw it in real time.
I was working for BR Shipping company called Sealink.
With 50 ships and large parcels of land around each port (more than the British Navy and part of the navel reserve).
Sold to American Tory owned supporter SeaContainers for £60m - less than half the price.
A few years later they sold the company on to Stena line of Sweden for more than double.
When Thatcher said "buy British", people thought she was urging them to buy British products; in reality she was signaling to foreign Tory supporters that she would not mind them buying British assets.
Water, Electricity, Gas, Railways, etc all sold to her supporters at half the value.....