Thames Valley devolution expression of interest submitted to government

An expression of interest letter to create a mayoral strategic authority (MSA) within the Thames Valley has been submitted to government following discussions and agreement by 13 councils.

Published: Friday, 19th December 2025

Devolution EOI signed by Mary Temperton and Liz Leffman

The expression of interest sets out a shared ambition for an MSA – a new combined authority led by a directly elected mayor and made up of a number of councils – to secure new powers and funding for the area. This would enable local councils to plan and deliver more integrated and effective transport, infrastructure, the right type of housing – with an emphasis on social housing – creating the conditions for faster, more inclusive growth across the region.

The MSA will make decisions that positively impact communities and businesses across the wider region, with local councils continuing to deliver critical and wider public services for the benefit of all residents.

Councils across the region debated the expression of interest in their meetings during November and December. The letter submitted to government was signed on behalf of these authorities by Councillor Mary Temperton, Leader of Bracknell Forest Council and Chair of the Berkshire Prosperity Board, and Councillor Liz Leffman, Leader of Oxfordshire County Council.

Councillor Jim Robbins, Leader of Swindon Borough Council, said: “This is a significant moment for Swindon as this path we are taking has the potential to unlock billions of pounds for the economies in the Thames Valley region and will put us on an extremely firm footing for the future.

“We are making a really strong and compelling case to the Government and I am particularly proud of the role we have played in getting us to this point, having hosted our Thames Valley partners at the very first strategic devolution meeting at Lydiard House back just over a year ago.

“This partnership shows what can be done when political differences are put aside to pursue an opportunity that will benefit all our residents for many years to come. Our councillors in Swindon have come together as one to back this deal and it is great this has extended to the cross-border support from our Oxfordshire and Berkshire partners.

“I am looking forward to continuing our conversations with the Government so we deliver more jobs, better transport infrastructure and good quality homes for all our residents across the Thames Valley region.”

Councillor Mary Temperton, Leader of Bracknell Forest Council and Chair of Berkshire Prosperity Board, said: “Signing the expression of interest is an important step forward in our local devolution journey and together we hope that this will provide a compelling case to government for sustained investment in the region. I am looking forward to continuing the productive discussions that have been taking place and developing our plans with government.

“Our aim with the MSA is that it will help boost the local economy and improve services that are really important to our residents, like transport and housing as well as boost jobs. It will also be an opportunity for our area to take charge of big infrastructure projects which make a real difference to lives locally.”

Councillor Liz Leffman, Leader of Oxfordshire County Council, said: “We have a once in a generation chance to seize the opportunities that devolution offers. By coming together as a strategic authority, our councils can better coordinate resources and expertise to deliver the support our residents need. Our collaboration will support innovative businesses, expanding access to skills training, affordable homes, and a modern, joined-up transport network – ensuring everyone benefits from new opportunities and an improved quality of life.

“A Thames Valley MSA will harness the collective strengths of the region to unlock unparalleled prospects for inclusive and sustainable growth. It provides a unique opportunity to shape our urban and rural places ensuring lasting benefits for current and future generations.

“I look forward to continuing further discussions with councils and government on realising our vision.”

The Thames Valley MSA will be designed to speed up delivery, attract investment and strengthen one of the UK’s most productive and innovative regional economies. The ambition is for a strategic growth partner for neighbouring authorities where joint working will be beneficial, for example councils linked to the Oxford - Cambridge corridor.

Council discussions will now continue, including with government, with detailed proposals being developed in the coming months for consideration by local councils and partners.

For further information visit www.reading.gov.uk/devolution.

Picture: Mary Temperton (left), Leader of Bracknell Forest Council and Chair of the Berkshire Prosperity Board, and Councillor Liz Leffman, Leader of Oxfordshire County Council, signing the devolution Expression of Interest letter on behalf of Swindon and 12 other local authorities

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