At the end of October the SDP Consortium submitted its full document set for Critical Design Review. (These can be found at http://ska-sdp.org/publications/sdp-cdr-documentation) together with a large number of supporting memos (http://ska-sdp.org/publications/released-sdp-memos-i and http://ska-sdp.org/publications/released-sdp-memos-ii). Table 1 below shows the documents in three main categories: those associated with software and hardware architecture; those explaining the supporting prototyping work that has been undertaken in support of the architecture, and finally those associated with system engineering (SE) and programmatics aspects (e.g. specifications for how SDP interfaces with the wider telescope systems and how components will be constructed). The documents will receive observations from a panel of reviewers up until the end of December. Responses to the observations and scenarios to ‘test’ the architecture will then be discussed at a review meeting from 15th to 18th January 2019 at Jodrell Bank.