Flying Stone
Sorry my error. On a co pilot handling sector ,role reversal is from engine start. P2 starts engines, handles pushback etc. taxy ,(I checked for current SOP with a relative LHR based, P2 on A380)
A P2 on a two crew aircraft presumably must be fully experienced, trained, and Line cleared, for all aspects of the operation ie crew incapacitation.
I'm surprised that some airlines P2 not trusted with thrust lever handling/RTO. Quite a straight forward decision to call "Stop" for Loss control, Engine failure /fire warning. Blocked runway etc.
Agree, difficult to taxy with no tiller on your side!