About us

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Mark Philpot

Managing Director

Mark Philpot

Born in Norfolk, Mark left to study Town & Country Planning at Newcastle University and later at the Bartlett School at UCL, London, where he completed his MSc in Town Planning. He has been a corporate member of the Royal Town Planning Institute since 2002.

Mark spent over a decade working in London within the private sector for a range of West End practices and within local government, before returning to Norfolk to start a family.

Mark launched One Planning in 2011. Through hard work and a commitment to delivering the best possible service, he has seen the practice go from strength to strength, recording solid year-on-year growth.

Mark remains actively involved in all new instructions, and brings his considerable experience to bear on many individual projects. His work includes managing planning consents for large infrastructure projects such as the Docklands Light Railway Three-Car Extension Project, and mixed-use urban redevelopment proposals such as the redevelopment of St Mary’s Works, Norwich.

Debi Sherman

Director of Planning

Debi Sherman

Debi’s roots are in Norwich, where she lives along with most of her extended family.

Debi studied for both her BA in Urban Planning and Management and her MA in Environmental Planning at Nottingham University between 1990 and 1994. She has been a corporate member of the Royal Town Planning Institute since 1997, and also holds a Level 5 qualification from the Institute of Leadership and Management.

Debi has spent most of her career in the public sector, working for local planning authorities in London, Essex and most recently Norfolk. A seasoned expert in development management, she has spent the last five years dealing with strategic development projects and managing multidisciplinary teams tasked with project development and delivery of strategic development sites.

With long experience of negotiating with a variety of stakeholders, Debi applies a ‘solutions-led’ approach to managing organisations and individuals who frequently have competing interests, as part of the wider task of balancing the planning process.

Debi joined One Planning in 2018 as Head of Planning and took up Directorship in 2020. She manages the day-to-day operations of our Norwich office, liaising with clients, local planning authorities and other interested parties and dealing with a wide variety of site appraisals, applications and appeals.

Heather Byrne

Senior Planning Consultant

Heather Byrne

Heather is a Licentiate Member of the Royal Town Planning Institute and a qualified town planner. She has a Masters in Planning and a BA in Urban Studies and Planning from the University of Sheffield.

With more than six years’ planning experience, Heather has worked mostly as a Planning Officer for Local Planning Authorities within Norfolk, but has also worked within the private sector and undertaken contract work for East Staffordshire Borough Council and Newark and Sherwood District Council.

Over the course of her career, Heather has gained a wide range of experience in all aspects of Development Management and Planning Policy. She has managed a wide range of schemes including major and minor residential and care-home developments, agricultural, industrial, retail, renewable energy, screening opinions under the Environmental Impact Assessment Regulations, tourism and community developments. She also has experience of dealing with planning appeals.

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