Hi Dylan... and welcome!

Any thoughts on Dylan's query, Tisha ?

Hi Dylan, I'm one of the internal assessors with the CIPD. Thanks a lot for your question and great to hear that you're planning to upgrade your membership. Is it Chartered Membership you are going for? I ask because as you probably know, the time-scales for demonstrating impact differ according to the level. So, for Chartered Member, we will be looking for evidence in your application that your work has brought medium to long-term value to your business(s) (typically over a year) and for Chartered Fellow, we would look for evidence of sustained value over the long-term (typically over 2-3 years).
And we appreciate the sensitive data/GDPR restrictions around obtaining physical evidence of impact if you've moved to a different company. It sounds like you have already got some rich data around impact re: your D&I project - and as long as that it is within the 5-year window, it sounds valuable to include.
You can absolutely describe evidence of the value of your work, within your answers - you won't need to submit supplementary information.
As an aside, when you're reflecting on the best examples, please do include those initiatives that have been both implemented and evaluated. And where you can demonstrate the positive change your work had. That's probably the best guide to use in terms of deciding when the time is right to upgrade :)
Does that help? I'm very happy to continue the conversation.
Thank you very much Dylan,
Tisha.

In reply to Tisha:

Much appreciated, Tisha