Deloitte arrived late to legal services. It only got its ABS licence to practice law in the UK in June last year, while all three of its major rivals had been doing so since 2014.

But just four weeks into the job as Deloitte’s new head of legal, Michael Castle, ex-senior partner and formerly a managing partner contender at Allen & Overy, has decided he is not prepared to play catch up, but has a plan for some smart technological leap-frogging.