The extension is due to HS2 Ltd releasing new information on the Phase 1 Exceptional Hardship Scheme which has been deemed essential for Phase 2 consultees to make fully informed responses.  The additional information can be accessed below:

Supplementary Information Note
HS2 Blight study
Phase 2 consultation extension Q and A

Those who have already submitted a response can provide a new/further response if they wish in light of the new information released.

For more information please go to the HS2 Ltd website at http://www.hs2.org.uk/have-your-say/consultations/phase-two/exceptional-hardship-scheme