In general, the scheme could be run by anyone with an interest in mentoring. We recommend that the leads should have had mentoring training (but formal accreditation is not necessary) in order to provide teaching sessions as well as supervision and support for mentors.
An example course is: http://mentoring.londondeanery.ac.uk/training
The administrative load is considerable and includes database management and regular e-mails supporting mentoring pairs during their relationship.
Schemes run solely by enthusiastic trainees have been successful, but, particularly in smaller rotations, this poses challenges in sustaining them long-term.
To run a peer mentoring scheme successfully, we recommend both time and modest financial budget for administration, participation, training and supervision/support