ICF's guidelines on the GDPR aspect to this state that: "you mustn’t keep data for longer than necessary."
In practice this means: reviewing the length of time you keep personal data; considering the purpose or purposes you hold the information for in deciding whether (and for how long) to retain it; securely deleting information that is no longer needed for this purpose or these purposes; and updating, archiving or securely deleting information if it goes out of date.
Coach Advancement Limited will keep recordings for the duration of the mentoring programme, after which they will be deleted. ICF will keep a recording for up to 6 months after receipt, after which they will delete it.