It resumed after the Second World War primarily involving migration of Burghers, who fulfilled the then criteria that they should be of predominantly European ancestry and that their appearance should be European. Sinhalese migration began in the 1960s but it was after the mid-1970s that large groups arrived, which also included Christians and Buddhists. Sri Lankan students undertook courses in Australia as part of the Colombo Plan prior to the formal dismantling of the White Australia policy, and after 1973, Sinhalese, Tamil and Moor migration resumed.