The committee heard 1600 petitions from objectors and those concerned with the construction of the first phase of the railway from London to Birmingham and recommended a longer tunnel in the Chiltern hills north of London, better noise mitigation in some locations and revisions to the planned maintenance depot at Washwood Heath, Birmingham.

It rejected calls for HS2 and the London to Glasgow West Coast Main Line to share tracks on the short distance between London Euston and Queen's Park, arguing that such a move would reduce capacity compared with the existing plans for a tunnel.