 The plan was published shortly before the 2010 election, and has since been adopted and taken forward, largely unchanged, by subsequent governments.In July 2015, Adonis was appointed a non-executive director to HS2 Board Ltd.

Adonis planned and announced the electrification of the Great Western Main Line from London Paddington to Bristol, Cardiff and Swansea, and the electrification of lines in North West England from Manchester to Liverpool and Manchester to Preston.This electrification programme, except for the Cardiff to Swansea section of the Great Western, was taken forward by the coalition government.