The donor appointed A to be her attorney and then appointed B to act in the event that A should be unable or unwilling to act or died. The donor then stated that A and B should act jointly and severally. On the application of the attorneys the court severed the words "jointly and severally", so that the instrument could be registered as an EPA appointing A as primary attorney and B as substitute attorney. [OPG summary - EPA case.]
Summary from OPG website.
Title: Re Farrow (an order of District Judge Eldergill made on 18 August 2010)
Heading: Appointment by donor of substitute attorneys
Not on Bailii - no transcript
Summary on OPG section of Justice website