High Speed Rail (London - West Midlands) Bill

I am thinking of circumstances in which a constituent has effectively lost their business because it was disrupted by the HS2 works, and has made alternative arrangements, with great difficulty and at a financial cost. Now that AP4 has introduced extended tunnelling, they would have been in a much better position, because their business could have been saved. Will the door still be open for them to negotiate with the Department for the compensation that would have been due to them had AP4 not come into existence?