Mark Stansfield

Senior Director of UK Analytics
CoStar

Mark Stansfield is Senior Director of UK Analytics at CoStar with 20 years’ experience analysing and researching commercial property. He manages CoStar’s team of UK analysts and is responsible for analytics output in the UK, as well as covering the London market and leading CoStar’s coverage of the office and retail sectors in the UK.

In addition to delivering timely, relevant and actionable insights for CoStar clients through a variety of media, Mark works closely with CoStar’s dedicated News team to report on key transactions and issues affecting commercial property across all sectors and regions, with particular emphasis on London. 

Mark is a graduate of the University of Leeds and has undertaken professional development through the University of Cambridge and the Royal Institute of Chartered Surveyors. Mark is a member of the Society of Property Researchers, the Investment Property Forum and the European Commercial Real Estate Data Alliance.

Louise Duggan

Head of Regeneration & Growth Strategies, Good Growth
Greater London Authority

Louise is responsible for the definition of GLA investment strategies, delivery of area-based regeneration programmes, enabling of strategic growth opportunities and the promotion of quality and inclusion in the built environment. Each of these supports delivery of Mayoral priorities founded on the principles of good growth and aligned with the London Plan.

She leads a high performing team of urbanists and designers who work with boroughs, strategic partners, charities, social enterprises, and community groups, to deliver initiatives across scales from buildings and public spaces through to strategic growth opportunities in London. 

The team’s work on the £75m Good Growth Fund, in partnership with organisations and communities is delivering award winning projects. The projects meet partners needs while also prototyping solutions for the city at large. 

Before joining the GLA in 2012, Louise worked at the Commission for Architecture and the Built Environment (CABE), where she established and led the Street Design and Placemaking Programme reflecting the wider social and cultural role of streets in the everyday life of communities. Her work informed fundamental revision of national policy and design guidance.

James Rayner

Head of Retail
Related Argent

James joined Related Argent in 2019 as Head of Retail and is responsible for retail, hospitality and leisure across all its projects. James is responsible for the evolving tenant mix in King’s Cross and Tottenham Hale, as well as delivering the retail under Google's new landscraper in King’s Cross. He is also focused on ensuring the retail strategy at Brent Cross Town supports the overarching masterplan.

James has more than 20 years’ experience managing and advising on placemaking, retail leasing, developments and value creation within mixed used assets. Prior to his role at Related Argent, James worked at British Land where he was responsible for the flagship letting to Eataly in Broadgate. James is part of a special committee advising the Museum of London board on its relocation to Smithfield’s market in 2026.

Vivienne King

Founder, Impactful Places
Revo, Board Member

Vivienne King

Founder, Impactful Places

Vivienne King is an independent advisor specialising in strategic support to the real estate industry in achieving its positive impact potential. Vivienne has held leadership positions in real estate for more than 30 years, with a strong focus on retail and ESG throughout. 

Prior to founding Impactful Places in 2024, Vivienne was Head of Real Estate at The Good Economy, CEO of Revo, Soho Housing Association and Soho Ltd and for over 20 years with the Crown Estate, as General Counsel and member of its Executive Committee.

 Vivienne chairs the Shopkeepers Campaign for business rates reform; she is non-executive board member of Revo; a co-founder of real estate DEI organisation, Real Estate Balance; a LandAid Patron and Executive Vice President of the Story of Christmas charity. 

 In 2023, Vivienne was inducted into the Property Week Hall of Fame for her work in the real estate industry.

Pablo Sueiras

Head of Brand Account Management
LandSec

Ellen Peters

Property Director (UK&I)
Lush Cosmetics

Susannah Walker

Co-Founder
Make Space for Girls

Susannah Walker is co-founder of the charity Make Space for Girls, which campaigns for parks and other public spaces to be designed with teenage girls in mind, working with councils, developers and architects to create better and more inclusive places across the UK by foregrounding the voices of girls and young women. She now also advocates more widely for the needs of women and girls to be considered at every stage of the planning and design process.  A former museum curator and television producer, she has also written several books.

Allan Lockhart

CEO
NewRiver REIT plc