Oxford to Cambridge Growth Corridor

The Oxford Cambridge Growth Corridor is defined as the area between Oxford, Milton Keynes and Cambridge, incorporating Oxfordshire, Buckinghamshire, Bedfordshire, Northamptonshire and Cambridgeshire.

The area has a population of around 3.5 million.

The government have said the Corridor is a "a key economic priority for the country" and "has the potential to be Europe's Silicon Valley."

Background

The idea of connecting the economies of Oxford and Cambridge and surrounding area first emerged in the early 2000s. The then Oxford to Cambridge (O2C) Arc was established by three regional development agencies (RDAs), the South East England, East of England and East Midlands RDAs and aimed "to create one of the most successful knowledge-based economies in Europe."

An article on the history of urban corridor strategic spatial planning in Southern England described these initial efforts as "a limited exercise" that "developed little traction in political or policy terms" that was shelved following the abolition of regional development agencies by the Coalition Government.

The idea reemerged in 2016, when the National Infrastructure Commission (NIC) was asked to "consider how to maximise the potential of the Cambridge – Milton Keynes – Oxford corridor as a single, knowledge-intensive cluster that competes on a global stage, protecting the area’s high quality environment, and securing the homes and jobs the area needs."

In 2016, the NIC published an interim report on the Cambridge – Milton Keynes - Oxford Corridor and a full report a year later.

These reported that the economic success of the area was being hampered by a lack of infrastructure, specifically housing and east-west transport links, concluding that "without a joined-up plan for housing, jobs and infrastructure across the corridor, it will be left behind by its international competitors."

In 2019, the government and local authorities involved in the Arc published a joint "declaration of ambition", which (amongst other things):

• Acknowledged the need "to deliver significantly more homes in the Arc"
• Recognised need "to plan for and deliver substantial additional infrastructure", and in particular "supports the delivery of transport links such as East West Rail and improvements to the strategically important roads network"
• Emphasised the need to meet "economic and housing ambitions" while "improving, rather than degrading, the environment."

The 2020 Budget announced plans for the government and local partners to publish "a long-term Spatial Framework to support strategic planning in the OxCam Arc" and "support the area’s future economic success."

In 2021, the government published Planning for sustainable growth in the Oxford-Cambridge Arc: an introduction to the spatial framework. This indicated the government intended to develop a long-term Spatial Framework for the Arc that will support "better spatial planning, provide a blueprint for better-targeted public investment, give investors and businesses greater long-term certainty over growth plans, and allow communities to shape the long-term future of places across the region."

A consultation on the framework was open between July and October 2021.

Recent developments

In January 2025, the Chancellor Rachel Reeves delivered a speech at Siemens Healthineers in Oxfordshire, outlining the government’s commitment to the now named Oxford to Cambridge Growth Corridor, saying the area "has the potential to be Europe's Silicon Valley" and "could add up to £78 billion to the UK economy by 2035."

A government press release on Jobs, homes and better transport links for the Oxford Cambridge Growth Corridor published on 23 October 2025 outlines investment plans for growth including new homes, infrastructure and business space:

• The government plans to establish a new centrally led development corporation to support the growth of Cambridge, and intends to consult on proposals.
• The Cambridge Growth Company has been established, as a subsidiary of Homes England, to remove barriers to growth in Greater Cambridge.
• Water infrastructure investment was announced in March 2025 which the government said would "support sustainable growth".
• Tempsford in the Oxford to Cambridge Growth Corridor has been identified by government as key potential site for a new town.
• Up to £400 million of initial government funding to "kickstart development in Cambridge" with affordable homes, infrastructure and business expansion, and £15 million investment in University of Cambridge Innovation Hub.
• Investment in stations in Oxford "to connect people to jobs, homes and opportunity".
• Expansion of the Oxford base of the Ellison Institute of Technology over the next decade with a £10 billion of private sector investment.

Matthew Pennycook, Minister for Housing and Planning, confirmed these measures in a statement on Delivering ambitious and high-quality sustainable growth in Greater Cambridge, on 23 October 2025.

In October 2025, the government published an investment prospectus for the Oxford-Cambridge Growth Corridor. This states:

• The area covered by the Oxford Cambridge Growth Corridor Generates £143 billion in GVA
• 30% of all jobs in the area in knowledge intensive sectors, almost triple the average for Britain
• Greenfield investment had led to 43,000 jobs created in the area over the last ten years

In terms of planning, the Oxford to Cambridge Growth Corridor investment prospectus says there is "active government support to remove barriers" with reference to wider planning reforms, accelerated electricity grid connections, and fast tracking of critical infrastructure projects.

Transport East-West Rail

As part of the Arc, there are plans for an East West Rail (EWR) scheme, which will re-establish a rail link between Cambridge and Oxford to improve connections between East Anglia and central, southern and western England. The proposed East West Rail route falls into three distinct sections:

• Connection Stage One: Services will run from Oxford to Bletchley/Milton Keynes (Infrastructure completed in 2024 – however yet to run passenger services due to a current dispute over who will operate the train doors)
• Connection Stage Two: Services will extend from Oxford to Bedford
• Connection Stage three: This stage completes the full East West Rail connection, and will see services run from Oxford to Cambridge via Bedford and Bletchley.

The government established the East West Rail Company on 14 December 2017 as a non-departmental public arms-length body "to accelerate delivery of the project and bring new drive and focus."

Oxford-Cambridge Expressway

The Oxford-Cambridge expressway was also proposed as a means to address the poor east-west road connections between Oxford and Cambridge. Further information on the options considered is given in National Highways 2018 Oxford-Cambridge Expressway booklet [PDF]. The project was subject to legal challenge in 2019, but the High Court found in favour of the government.

The government initially supported the project [PDF], but National Highways found there was no cost-effective option for the expressway. Consequently, the government decided to cancel the project in March 2021.

Consultations

East West Rails third non-statutory consultation closed on 24 January 2024, with some emerging findings published in May 2025.

As part of approving a development consent order (DCO) for Nationally Significant Infrastructure Projects (NSIPs), a statutory consultation is presently required by the Planning Act 2008 in the pre-application stage. The Library briefing on Planning for Nationally Significant Infrastructure Projects has more information on DCOs.

However, during the passage of the Planning and Infrastructure Bill the government introduced new clause 4 which would remove the statutory requirement for NSIP applicants to carry out pre-application consultation. More information on new clause 4 can be found in the Library briefing, Planning and Infrastructure Bill 2024-25: Progress of the Bill under section 2.2.

New clause 4 was added to the Planning and Infrastructure Bill on 29 April 2025 during the Public Bill Committees fourth sitting.

EWRs statutory public consultation has therefore been delayed until early 2026 while the company reviews the potential impact of the Planning and Infrastructure Bill.