The windrush Generation arrived in UK 1948 and had freedom of movement throughout the commonwealth
The West Indies gained Independence from UK in 1962,
Due to ever increasing levels of commonwealth immigration to UK, The 1962 Immigration act was proposed to place some restrictions on Commonwealth immigration with the exception of children (under 16) joining parents already settled.
In 1973 the immigration Act came into force.
Those already present and settled in the UK when the Act came into force on 1 January 1973 – i.e. those without any restriction on their leave – were automatically entitled to stay indefinitely in the UK (section 1(2)).
The Windrush children, with no restriction on their leave to enter or remain courtesy of section 2(2)(b) Commonwealth Immigrants Act 1962, were automatically entitled to settled status at that time.
It would be interesting to know the ages of these people who are to be deported, and what has Windrush to do with their deportation. These people would have had to have been born outside UK before 1973 to get automatic citizenship when they arrived. If they were born here then of course they are UK citizens. If neither applies, what is the issue with deportation?