Re Baldwin (2009) COP 14/5/09
The donor appointed X as original attorney, Y as the replacement for X, and Z as the replacement for Y if Y was unable or unwilling to act. On the application of the Public Guardian the court directed the severance of the appointment of Z on the ground that the MCA does not permit a donor to appoint a person to take over as a second replacement attorney if the first replacement attorney starts to act and then becomes unable to act. (OPG summary.)
The summary above is taken from the OPG website. It is listed under the heading "Replacement for replacement attorney" as "Re Baldwin (an order made by the Senior Judge on 14 May 2009)".
No Bailii link (no transcript)