Chiltern Tunnel Vent Shafts

What about the Vent Shafts ? Can we have the risk assessments ?

19-Apr-2021: Requests 21-4162 to HS2 and HNL215819MB to the EA - will they get their stories right ?
21-May-2021: Response to 21-4162 from HS2; Reports for Chalfonts St Peter & St Giles are complete, Amersham is in draft. These are too large (to be redacted ...) Need to ask for less.
14-Jun-2021 - HNL215819MB: We have reviewed your request, and we believe there are 13 different technical documents covered by your request. We are dealing with your request under the Environmental Information Regulations 2004 (EIR).
Given the volume of information that has been requested, and in light of the First-tier Tribunal recently regarding the withholding of information relating to pumping stations and supply abstraction points under reg 12(5)(a), unfortunately it is taking us a little longer than usual to provide this information and we will be unable to provide it by 15 June 2021. We are currently working on the data and will provide it to you as soon as possible. Please accept our apologies for the delay, and we appreciate your patience in this matter.