The only reason I would point to potentially is the last but one bullet point of Disallowed Cost which includes for resources not used to Provide the Works after reasonable utilisation and wastage.
I think it is reasonable for their to be some change of staff, but it is subjective frequency of change and duration of hand-over period is 'reasonable'.
I think it is reasonable for their to be some change of staff, but it is subjective frequency of change and duration of hand-over period is 'reasonable'.