The case history summarizes a commercial site investigation report undertaken by a team of specialists from various disciplines. The aim was to better understand the mode of slope failure at the site location known as Upper Osprey on the northeastern coast of the Isle of Portland in order to support the safety case for the proposed development, starting with a desk study.

I thank Professor Brunsden for commenting. For clarity and ease of reading in the following text the convention adopted with reference to figures is B1996 for those published by Brunsden et al (1996) and P2019 for those published by Privett (2019).

It is important to note that the West Weare to Penn's Weare cross-section in B1996, figure 18 does not pass through the site. Penn's Weare is c. 2 km to the south of the site, on the southeastern coast of the Isle, with a different form …