Many publications, such as government publications, are updated over time. For example, the Statutory framework for the early years foundation stage was originally published in 2014, and most recently updated in 2018. You should use the date when the publication was last updated in your citation and reference.
Note: If you are writing specifically about a change between the original and updated versions, you can show this in your citation by using the original year, “updated in” and the year it was updated.
Example: (Nursing and Midwifery Council, 2010 updated in 2020).