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incoming tenant’s system is drastically reduced.”

The accelerator hall is located at basement level, beginning at the front of 141 Harley Street, travelling through two enlarged openings either side of the original wine vault, and through to the newly formed lower basement space, before dropping down to the lower basement levels. The length is restricted by the front lightwell in the 141 Harley Street elevation, and to the rear the electrical substation that is accessible from Devonshire Mews West. Protons travel along a beam line the width of a straw before reaching the treatment room. Lee Forrest, Vice-President, Client Operations, at Advanced Oncotherapy, added: “At sub-basement level we are 10 metres below Devonshire Mews West. However, there is another level below this: the beam trench level at round 15.5 m below Harley Street. This will be used as a beam transfer space to allow the second treatment room to come online for full treatment. A pit for a second robotic arm has also been set into the sub-basement slab to allow for the second treatment room.”

Power, cooling, and ventilation Advanced Oncotherapy’s state-of-the-art equipment will require extremely accurate cooling. All areas below ground will also require comfort cooling and mechanical ventilation. Hence, most of the mews houses are dedicated to plant. At 143 Harley Street, a new courtyard design has installed paviors which sit on top of a steel mesh with gaps in between so that air can flow into the plant space below. There will be a ‘raised bed’ topped with steel mesh, the idea being that this will be used to exhaust hot air from large chillers below. The link between the rear extension to 143 Harley Street and the mews has been infilled – again with a steel mesh floor and three large louvered openings, to maximise the air flow in this area. The windows and doors in the mews buildings are the traditional sash windows one would expect, but instead of glass, they have an insect mesh to allow for air flow. Acoustic louvres will be positioned behind them as part of the tenant’s fit-out. This was a unique project, with its own special challenges. However, on completion it will be a tremendous addition to the HSMA, and a centre for groundbreaking treatment. Making proton beam therapy more widely available will have a hugely positive impact on many lives, especially for young people who are fighting cancer. The spirit of partnership among all the parties involved has been outstanding, and everyone has shown total commitment to a project which is delivering state-of-the-art medical technology in a heritage property setting.

About the authors Julian Best

Julian Best is Property Investment and Strategy director at The Howard de Walden Estate, which owns the majority of property across the HSMA. Howard de Walden has been supporting medical excellence in the area for more than 200 years. He oversees a diversified portfolio of medical, retail, office, educational, and residential assets across the 92-acre estate.

Jonathan Farr

Jonathan Farr joined Advanced Oncotherapy in 2017 as director of Medical Physics, and was appointed Chief Clinical Officer in April 2019. He received his PhD degree from Wayne State University in 2003, and completed his Habilitation (an advanced postgraduate qualification subsequent to a doctorate) in novel radiation oncology techniques at the Universitätsklinikum Essen-Duisburg in Germany in 2012. He has contributed to the development, characterisation, and application of numerous particle therapy systems. Dr Farr has served as chief of medical physics at the Westdeutsches Protonentherapiezentrum in Essen, and at the St. Jude Children’s Research Hospital in the US. He is board-certified by the American Board of Radiology in Therapeutic Physics, has published over 50 papers in peer-reviewed journals, and presented over 150 abstracts at scientific conferences.

Lee Forrest

Lee Forrest, Vice-President, Client Operations, at Advanced Oncotherapy, joined the company in 2017 after 18 years at Elekta. Early in his career, he spent a number of years installing radiotherapy ‘linacs’ in hospitals globally, before becoming a project engineer spending his time consulting with clients on the technical infrastructure required for different types of oncology equipment, including radiotherapy, brachytherapy, and radiosurgery. He then moved on to the full project management of the commercial projects, implementing a diverse range of oncology solutions, including full customer turnkey projects for private radiotherapy centres across the UK.

At Advanced Oncotherapy, he is responsible for the delivery of commercial projects, and the day-to-day running of the Advanced Oncotherapy Client Operations department, including building design, customer liaison, construction and site readiness, installation, commissioning, and customer handover. The core team is also working with CERN to bring the product to market with full certification and approval to satisfy the growing order book, working with the company’s Business Development team to create strategies for service and maintenance contracts.

David Wright

David Wright, an associate at Sonnemann Toon Architects, has more than 10 years’ experience in clinical planning and the design of major healthcare schemes. He has a keen interest in and knowledge of listed buildings – respecting their historical value and bringing them into 21st-century use – and has worked on multiple schemes within the Howard de Walden Estate. Since completing his university study in South Africa, he has been ‘on site’ delivering projects for over 15 years, giving him ‘an intimate and practical understanding of construction’. He leads Sonnemann Toon’s digital standards (including BIM), and has helped the office develop a well- coordinated healthcare library and rigorous approach to the production of information for healthcare construction projects.

Other key project participants Main contractor: Deconstruct UK. Structural engineer: Fairhurst. M&E engineer: Vector Design. Quantity surveyor: Nexus Project Services. CDM: Symmetry HS.

hej 90 Health Estate Journal September 2020

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