Recovery of a Launchpad account without email access

Hello,

I am the owner of the following account : https://launchpad.net/~leligeour that is linked as admin to the following team : https://launchpad.net/~performous-team

However, I strongly think that the email address that is used is from my former academic position (something @ensiie.fr).

I would like to recover this account (this is for Launchpad admins), I can see 2 ways of trust that can help:
- the Jabber ID email entered 10 years ago on this account is still accessible for me (so switching the email of the account to the email provider as JabberID could enable me to recover my password).
- The project I am administrating (performous) on github could be a path of trust, using the email used in my GitHub account and merges (https://github.com/yoda-jm) could also help me reset my password there.

Hope that one of those chain of trust could be enough to change my email address of my launchpad account

Vincent

PS: this question was posted using an account specifically created to ask this question