COMMONWEALTH IMMIGRANTS ACT 1962

The 'Commonwealth Immigrants Act 1962' was an Act of the Parliament of the United Kingdom.
Before the Act was passed, citizens of Commonwealth of Nations countries (including The Republic of India, Islamic Republic of Pakistan (included East Pakistan province) and many Caribbean islands) had extensive rights to migrate to the UK. In response to a perceived heavy influx of immigrants, the Conservative Party government tightened the regulations, only permitting those with government-issued employment vouchers to settle.
The law was amended by the Commonwealth Immigration Act 1968, before being superseded by the Immigration Act 1971.
These Acts resulted in widespread opposition in Britain from a variety of political groups, but most notably the Conservative Monday Club, whose Member of Parliament members were very active and vocal in their opposition to immigration.