Updating process
JNCC will maintain the lists at least annually and incorporate
updates and corrections as necessary. If a source list, for example
a red data book, has been reviewed in whole or in part, JNCC has
had to decide whether or not to archive some or all of the content
of the previous list. This has not always been straightforward
particularly in the case of some of the invertebrate red listings
where some but not all of the previously published list has been
reviewed and the status of the review is regarded by many as being
"provisional". Nevertheless we wanted to avoid the confusing
situation where for example a species was listed as being
"vulnerable" on one listing and "critically endangered" on another
listing with the same geographical focus. In short we only show the
"designations" that are current within this spreadsheet. Records of
archived designations are however still maintained by JNCC for
auditing purposes, and are available from JNCC on request.