The first took place in summer 2013, and focused on the "principle of the scheme". The second was in 2014 when TfL asked for views on specific route options relating to Hackney, Kensington and Chelsea and an extension to New Southgate.
The Department for Transport also carried out a safeguarding consultation from November 2014 to January 2015. Safeguarding is a formal process undertaken by the Department for Transport to protect land required for major new infrastructure projects.
A spokesman for TfL said, "Feedback from these consultations, together with further scheme design, has helped develop the proposals for this consultation, which presents new information and invites comments on our proposals relating to: station locations, entrances and exits, shaft locations for the tunnelled section of the scheme, the construction sites required to build and operate the tunnelled section of the scheme, proposed service patterns."
The consultation can be found here: https://consultations.tfl.gov.uk/crossrail2/october2015/consultation
