Hi @Victor - thanks for getting back to me on this.
Regarding the h_bpm_email_approvals - I'm using the Authorisation node and have set an authoriser in it.
1. An email is then sent to the authoriser
2. Authoriser either Approve, Tentative or Rejects.
Is the above not the table that would manage this?
Just so you know, I've implemented a workaround by using a custom field to take the outcome, which I've then used as a filter in the report.