Jacob Umaga at the start of his apprenticeship – England boss Eddie Jones

Wasps’ Jacob Umaga is expected to win his first cap on Saturday (Mike Egerton/PA)

Eddie Jones has compared the development of a fly-half to a sushi chef as he urges England prospect Jacob Umaga to accelerate his own apprenticeship.

Umaga is set to make his debut off the bench in Saturday’s Six Nations match against Italy as cover for Owen Farrell after George Ford was ruled out of the visit to Rome by an Achilles injury.