2019 Speakers & Topics


The speakers at the Innovation in SuDS conference consider a number of issues and ap-proaches to the design, delivery and management of SuDS in the landscape.


Keynote speaker – Phil Chatfield

Phil Chatfield retired from the Welsh Government in July last year. He was there for 10 years, initially on a one year assignment from the Environment Agency. He has worked on SuDS for more than 25 years, and was involved in the development of the CIRIA SuDS manuals. He chaired the National SuDS Working Group (for England) in the early 2000's and was part of the of the Flood and Water Management Act 2010 Schedule 3 team. During his time with the Welsh Government, he worked on the Schedule's implementation, initially jointly with Defra and latterly for Wales alone. It was implemented in Wales in January this year.
His address will consider the development of SuDS policy in the UK from the early 1990s and the need for a change in the way surface water drainage from new developments was and is managed. The 2007 floods provided the incentive for change addressed by the UK and Welsh Governments through the Flood and Water Management Act 2010. Since then the two countries have followed different paths, with Schedule 3 implemented in Wales but not in England. Phil will finish with early thoughts on implementation in Wales, lessons learned on the way and the survival of some common SuDS myths!


Hilary Ellis

Hilary is a Chartered Member of CIWEM and has worked in the flood risk management sector for almost 10 years. Her career has spanned the public, private and third sector organisations and has also included EU funded research programmes and post-graduate study into the opportunities and barriers for SuDS implementation.

In her current role, Hilary works as Cambridgeshire County Council’s Principal Drainage Officer overseeing the team in providing flood risk and drainage advice in respect of new developments. She leads on partnership working and in 2016 led the development of a cross-district Flood and Water Supplementary Planning Document, covering five local planning authorities. Hilary has recently been appointed to work with Milton Keynes Council as a Flood Risk Contract Manager to assist with the growth of their LLFA team


Clive Moon

Clive Moon works as an Engineering Manager for the Vale of Glamorgan Council, delivering various flood and coastal risk management functions and more recently the Suds Approving Body enacted in January this year. He will present a summary of his experiences working for a Welsh LLFA and SAB following the implementation of Schedule 3. Three months after the legislation came into force what has changed and where do we see the remaining challenges in delivering the multiple benefits of well designed, implemented and maintained Suds?


Nick Bowen CMLI

Nick Bowen is a Landscape Architect and Director of Ian White Associates Landscape Architects, in Stirling.  A member of the Scottish Green Infrastructure Forum, he is keenly interested in SUDS, which form a key constituent in the work of his practice in masterplanning, detailed design and delivery.

From the perspective of a practitioner in Scotland, what are the challenges to creating the wonderful, multi-functional, rain-guzzling landscapes that we need?  Why do so many new schemes appear to pay little heed to the design guidance and best-practice examples promoted by CIRIA and others?  Through considering current policies, regulatory barriers, projects on the ground and new research, can we perhaps find a way to deliver on the promise of SUDS at last, an area in which Scotland made so much of the early running?


Anthony McCloy
Anthony took up the Managing Director role of McCloy Consulting in 2008. With a passion for water and the environment, the company has been grown over the last decade into an industry leader providing consultancy services to both public and private clients.
As a Chartered Engineer and a Fellow of Engineers Ireland, Anthony retains a technical ‘hands on’ role within the company and is nationally recognised for his contributions in the field of Sustainable Drainage. He regularly speaks at conferences and seminars, provides University lectures, delivers  National SuDS training workshops and has contributed to National and Local SuDS Guidance.

Presentation Abstract

Over the last 40 years there has been continued development of modelling methodologies which have developed our understanding of the hydrological and hydraulic processes at play in catchments drained by sewer systems in response to rainfall.

With recently introduced legislative and policy drivers (including Draft SfA8Ed) for Sustainable drainage (SuDS) it is anticipated that there will be a continual increase in the uptake of SuDS. When compared with conventional drainage SuDS introduce a change in runoff characteristics as runoff is filtrated through permeable surfaces or collected from hard surfaces and passed across SuDS surfaces. 

Small to moderate rainfall events can trigger CSO spills. With increased rainfall intensity produced with convective storm patterns, even low return period rainfall events can lead to localised surface water flooding in urban catchments. By ‘naturalising’ our urban landscapes, it is hoped that they will become much more resilient to these types of rainfall events. 

This presentation will consider the factors which have the ability to influence interception losses, drawing upon monitoring outputs from a scheme in London. It will also reflect upon how losses are normally represented within design and how current approaches could be adapted in the future to make allowance for losses as part of the SuDS design process. 


Richard Kellagher

Richard is a Technical Director at HR Wallingford. He has been involved in drainage and SuDS research for over 30 years. Richard’s experience in drainage ranges from research projects for UKWIR, sewerage and SuDS studies and expert witness work on flooding incidents.

He is the author of a number of drainage-related guidance documents including being a co-author of both the original and updated SuDS Manuals (CIRIA C697 and C753). He is the creator of the www.uksuds.com website and responsible for the research work which led to the current design criteria for stormwater management on development sites. He is also responsible for the creation of the TSRsim rainfall tool for generating extreme rainfall time series.

He was awarded the CIWEM 2015 WaPUG prize for “progressing the science of urban drainage”.

Presentation abstract

Current requirements are still (in England) wholly focused at the 1:100 year in spite of a softening of NPPF which recognises that SuDS provides surface water treatment and other benefits. Is this the right approach?

In the last month we have had headlines by the Environment Agency on the potential catastrophic position on water resources and this week it’s been on flooding. However this has been matched this week by the crisis announcement of biodiversity collapse with the extinction of 1 million species due to mankind’s management of the environment. Although the climate change target aspired to by governments is to limit the increase in temperature to 1.50C there seems little realistic chance of this happening.

The spend on drainage storage provision for 2-300,000 houses a year is probably of the order of £1000M. We need to be pretty sure that this investment in putting holes in the ground is the best way to spend this budget.

This talk provides a high level overview of what we do now and the basis for doing this, and whether current storage design is effective. This is followed by suggestions as to what might be a smarter approach. Meeting the challenges we face requires a radical change now in how we design drainage systems for developments.


Zac Tudor

For over 20 years Zac has worked for Sheffield City Council, where he has had responsibility for major public realm project delivery from inception to completion of projects on site.
His main focus has been on the multi-functional benefits of landscape design in our streets and spaces, while helping encourage economic regeneration in the City of Sheffield. He has established himself as the key influence in developing Sheffield’s identity as a city of high quality public realm for which the city has gained recognition throughout the country. His place making solutions include a strong emphasis on climate change resilience using innovative planting design, city greening, sustainable urban drainage and local place all helping to promote a better quality of life.
Zac will be talking about Sheffield’s approach to designing and building its streets and spaces that encourages future development as well as building the cities resilience to climate change.


Sarah Boyd

Planning and SuDS: A Council Ecologist’s Experience

I have been the Ecologist at Eastleigh Borough Council, Hampshire for nearly a year.  Prior to this I have worked at the Environment Agency, the RSPB, an environmental consultancy and in the aggregates industry.

In my talk I will share my experience to date within the Council as an internal consultee in the planning process in relation to SuDS.  I will provide an insight into various discussions I have had with developers regarding SuDS design in different development schemes seeking planning permission.