They refer to this report on the impact of automation as well: https://www.pwc.co.uk/economic-services/ukeo/pwcukeo-section-4-automation-march-2017-v2.pdf
AFAICT it's got the same problems as so many of these "impact reports" in that they equate work with completing a series of tasks, and if a "task" can be done automatically, then that has no further impact.