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HiGround™ identifies every property in the UK at risk of subsidence

2018: CET’s HiGround™ identifies every property in the UK at the highest risk of drought-driven subsidence

CET’s new subsidence profiling and mitigation service, HiGround™, has successfully identified every property in the UK at highest risk of subsidence caused by the great drought of 2018 using the new and unique Subsidence Index, developed in a partnership between CET and the British Geological Survey (BGS).

Luke Bateson, BGS (Principal Scientist and Project Manager), explains: ‘’Using the Subsidence Index scores of the 2003 subsidence claims surge and an average subsidence claims year, we generated density plots of the claim locations from these two years, and then created contours from these plots. These contours allowed us to understand the spatial location of the claims, and discern how the location and density of claims change during a surge year.

A surge year sees an intensification of claims within areas where the highest number of claims are found within a normal year. There is no spatial migration of claims in a surge event.’’

Andy Lucas, CET Innovation Director continues, “It is evident from our analysis that there is a distinct Subsidence Index score range within which properties are more prone to subsidence during a claim surge year. Just by applying this to London alone, there are 1 million properties that fall into this category!

By applying the Subsidence Index to an insurer’s entire book, they can rapidly understand the extent and distribution of their subsidence exposure - with an opportunity to support mitigation activities. But equally, in the event of a claim, they can rapidly validate and assign the most appropriate resource, hence delivering far better customer service, as well as manage costs more effectively.”


How HiGround™ works

HiGround™ provides a range of subsidence risk profiling and mitigation services for book profiling,  premium setting and claims management and was developed with the support and co-funding of the European Space Agency.

The Subsidence Index details the likelihood of shrink–swell subsidence occurrence and is generated from a combination of best available geology, soil, property and tree information (with the ability to integrate satellite ground motion information), verified with historical insurance claims, to create a ‘property specific’ Subsidence Index presented in either basic or detailed scoring at both postcode and building level.  The outputs have been verified by the National Physical Laboratory.