Challenging High Speed 2 (HS2)

Challenging High Speed 2 (HS2)

The Chilterns Conservation Board has been involved in the High Speed 2 (HS2) project extensively since it was first announced in 2010 and together with many other local groups and individuals, argued that the route should not pass right through the middle of the protected landscape of the Chilterns AONB.


The Government made the decision to proceed with phase one of HS2 in 2020 and the Chilterns Conservation Board remains steadfast in its view that HS2 will have a significant and lasting negative impact on the Chilterns Area of Outstanding Natural Beauty, it continues to work with relevant partners to secure the best possible outcome for the environment despite the decision.

Over the past ten years we have worked hard to reduce the impact of HS2 on the landscape. Just some of our work includes:

  • Influencing design and work on projects to maintain green corridors, and provide wildlife biodiversity and connectivity through the HS2 Review Group
  • Submitting funding applications for environmental projects to mitigate damage. In 2019 we secured funding from BLEF to develop a programme to support local businesses and tourism affected by HS2. In addition, our Chalk, Cherries and Chairs Landscape Partnership also includes a number of projects around the central Chilterns area that will improve and enhance wildlife habitats and heritage of the area.

HS2 in the Chilterns AONB

The impact of HS2 on the Chilterns AONB

With the plans developed, we now know there will be a heavy environmental cost of HS2 on the Chilterns.

Useful information and archive

Find the latest HS2 news, links and information and access papers and reports from our archive.

The Chilterns AONB Review Group

Discover the work of the Chilterns AONB Review Group, established in 2016 to support identification and delivery of local HS2 mitigation measures.

Latest HS2 news

HS2: more sinkholes open up in the Chilterns

We are aware of a further two sinkholes appearing in farmed fields between Sibley’s Coppice and Frith Hill.

Hyde Heath Sinkhole

We have been made aware of a second sinkhole occurring above one of the HS2 tunnel boring machines (TBMs) in Hyde Heath.

Chilterns Conservation Board’s position on the cancellation of the Northern Leg of High Speed 2

The announcement by the Prime Minister cancelling HS2 north of Birmingham undermines the justification for the remaining section of the route.

Chilterns ANOB
Chilterns ANOB

Chilterns AONB Boundary Review

We are are working closely with Natural England to explore the case for and against extending the boundary of the protected area of the Chilterns AONB. Find out about the project, and how this could benefit people and the landscape on our Boundary Review page.
Chilterns ANOB

The Management Plan for the Chilterns National Landscape

The Management Plan sets out the policies and actions to be followed by all stakeholders to conserve and enhance this special place. The current Plan (“the Chilterns AONB Management Plan 2019-24”) has been extended to March 2025 and is currently under review.