Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.
Q: Paragraph: The UNCRC defines children , for the purposes of the Convention , as persons under the age 18 , unless domestic legislation provides otherwise . In that spirit , this timeline includes as children all those below the UK age of majority , which was 21 until 1970 when it was reduced to 18 . Although the Crown Dependencies of the Isle of Man , Guernsey and Jersey are not constitutionally part of the UK , the British government is responsible for their external affairs and therefore for their international treaty obligations , so this timeline includes references to matters in those dependencies .
Question: when did the age of majority change from 21 to 18 in the uk

A:
1970