Give a stream of consciousness and then the final answer. NI was first introduced by the National Insurance Act 1911 and expanded by the Labour government in 1948. The system was subjected to numerous amendments in succeeding years.

Based on this passage, when was national insurance introduced in the uk?
To answer the question, consider the following: NI was first introduced by the National Insurance Act 1911 and expanded by the Labour government in 1948.
So, the final answer is 1911.