I presume it's available somewhere, if one looks hard enough. london.gov.uk has a lot of detailed info, including minutes of transport committee meetings, various FOI requests (including an Uber one from earlier in the year - https://www.london.gov.uk/foi-disclosure-log/foi-uber-meetin... )

If there isn't enough already published then you could consider submitting an FOI yourself.

--edit-- This may be interesting and has various links to rulings by the London Assembly, and other bits and pieces:

https://www.london.gov.uk/press-releases/assembly/chair-of-t...