We work as a collective of individuals, bound together by the mission to create a more tranquil city future for all.

We are experts in environmental sciences, sustainability, noise, air quality, socio-economics and data science, who want to use our knowledge for good.

We do two things:

  • Create tools and campaigns that help people discover and embrace tranquillity every day – challenging the status quo;
  • Use multidisciplinary skills to help design tranquil spaces that are open to all, intriguing and promote healthier city-living.

Grant Waters

Director & Acoustician

Grant founded Tranquil City in 2016 as a creative outlet for his love of exploring lost and beautiful spaces within large cities. He is an acoustic consultant specialising in urban soundscapes, architectural acoustics and auralisation modelling.

Ben Warren

Technical Lead & Air Quality Consultant

Ben provides expertise in air quality and project management. He has twelve years of experience in professional air quality consultancy, ranging from national, regional and local government technical support to monitoring, analysis and dissemination of complex technical findings.

Julie Godefroy

Sustainability Consultant

Sustainability Consultant with experience in environmental, health and wellbeing strategies. Julie has been the sustainability advisor on the National Trusts Historic Environment Group for several years and is particularly interested in engaging urban audiences with our environment and architectural heritage, including public spaces.

Alberto Calzada

Data Scientist

Freelance Data Scientist, Data Engineer and Machine Learning researcher with experience in academia and industry. Predictive modelling, spatial and data analytics and data visualisation are some of his strongest points along with GIS systems, R&D and applied Machine Learning.

Diana Sanchez

Strategy & Socio-Economist

Diana provides experience on sustainable urban economics, and the quantification and monetisation of externalities. She is an economist, with a Master studies in Philosophy and MBA with a focus on sustainability and has 10 years of experience developing innovative approaches for integrating, managing and measuring social and environmental impacts.

Chloe McFarlane

Engagement Consultant

Chloe is an engagement consultant, with background in Geography. In conjunction with being on three youth panels (most notably Groundwork Youth), she has undertaken a series of placements with charities in London that champion community-led urban regeneration.

Katerina Papavasileiou

Strategy & Sustainability

Katerina combines economic and management science skills with experience as a project manager to provide holistic approaches on how we create places that people want to linger. She advises on strategy and delivery, is a champion of women in business and loves discovering how technological innovations change the way we experience our cities.

Eleanor Ratcliffe

Environmental Psychologist

Academic researcher specialising in links between environment and wellbeing.

Floriane Ortega

Urban Planner

Urban planner with experience in both developed and developing countries. She has experience in climate change adaptation and mitigation in Colombia, worked in Sub-Saharan Africa in urban water supply and sanitation infrastructure and was involved in the metro project in Hanoi.

Talks and walks

  • Wilkinson Eyre Architects Wellness Week 2018. 31st October 2018 at Bowling Green Lane, London.
  • ‘A Tranquil City Exploration – City of London’. 28th July 2018 as part of National Park City Week 2018. Support from the Greater London Authority.
  • ‘South London Sanctuary Spaces’. 25th July 2018 at Oval Station. Groundwork’s Inclusive Spaces Week 2018.
  • ‘Tranquillity is Open to all’. National Park City Fair. 21st July 2018 at Conway Hall, London. Hosted by National Park City Foundation.
  • IoT Week 2018. Poster Presentation. 7th and 8th June 2018 at Euskalduna Jauregia, Bilbao. Supported by OrganiCity and the Future Cities Catapult.
  • ‘A Tranquil City Exploration – Church Street’. As part of Church Street Avant Gardening series of events. 6th June June 2018. Supported by Carole Wright, Westminster City Council and The Showroom.
  • Mapping for Social and Political Change. 31st May 2018 at Space4, Finsbury Park, London. Hosted by Mapping for Change and Space4.
  • CPRE ‘Tranquil London’ Annual General Meeting. 24th May 2018 at Cowcross Street, London.
  • ‘Tranquil City: Embracing calm for healthier city living’ 18th May 2018 as part of Green Sky Thinking Week. Urban Innovation Centre, London.
  • ‘Finding Tranquil Routes to School’. 16th March 2018 at Lewisham Town Hall. As part of the Lewisham Schools Air Quality Champion Series of workshops. Tranquil City supported by OrganiCity.
  • ‘A Tranquil City Exploration – Deptford’. Tranquil City. 25th February 2018 at The Albany, London. Supported by OrganiCity, John Evelyn Community Garden and Lewisham Council.
  • ‘A Tranquil City Exploration – City of London’. Tranquil City. 24th February 2018 at Christchurch Greyfriars Garden, London. Supported by OrganiCity and City of London.
  • ‘A Tranquil City Exploration – London Bridge. Tranquil City. 21st February 2018 at Melior Place, London. Supported by OrganiCity, Better Bankside and Team London Bridge.
  • ‘Tranquil Pavement Launch and Workshop’. Tranquil City and Outlandish. 30th January 2018 at The Hive, Team London Bridge, London. Supported by OrganiCity.
  • Air Quality Monitoring Workshop: City of London Low Emission Neighbourhood. 3rd November 2017 at T. Rowe Price, Queen Victoria Street, London.
  • Active Travel and Culture Mile: City of London. Poster Presentation. 22nd November 2017 at the Museum of London.
  • ‘Designing for Life’. Slime mould in urban planning workshop. Tranquil City and Rosie Whicheloe. 24th October 2017 at LTS Architects, London.
  • Healthy City Design Conference 2017. Poster Presentation. 16-17th October 2017 at Royal College of Physicians, London.
  • Innovation and Pollution ‘How can innovation in cities become useful in tackling air pollution?’ Workshop. 5th July 2017 at the Crystal, London. Hosted by London Sustainability Exchange.
  • ‘Walking the Tranquil City: Can travelling via urban tranquil areas increase our health and wellbeing in the city?’ Green Sky Thinking Week 2017.
  • ‘Sustainable Transport’ Presentation in partnership with Tree Design Action Group (TDAG). 26th April 2017 at Transport for London, Southwark, London.
  • ‘Walking the Tranquil City’ Interactive workshop. 15th February 2017 at the Urban Innovation Centre, London. Supported by OrganiCity.
  • ‘Tranquil City’ at the OrganiCity Launch Event. 8th December 2016 at the Urban Innovation Centre, London. Host and supported by OrganiCity.



  • Sustainable City Awards 2018: ‘Healthier City’ Category. Shortlisted.