Project Overview
In preparation for the RAF’s centenary celebrations in 2018, SDC was tasked with refurbishing Hangar 1 at the RAF Museum in Hendon.






The works included the internal upgrade of the museum’s main hangar, with construction taking place around a Sunderland Flying Boat that remained in place throughout the project.
The highlight was the addition of a large, central mezzanine that acts as a building within a building, creating an enclosed space for meetings with display areas above.
Elsewhere, a restaurant was demolished, and a sliding access door was added to improve access when moving display items. SDC was also responsible for site-wide landscaping, external works, and the construction of a car parking area.


Maggie Appleton, Chief Executive Officer, RAF Hendon
“SDC site managers have been incredibly helpful and proactive in organising the work to keep our key exhibits open during the peak holiday times. They have been vigilant in ensuring a safe site and your subcontractors have been mindful of working in a family environment. They have been conscious of our need to maximise visitor parking and the early occupation of the bulk of the car park has been a significant benefit to us.”
Core Team

Francis Shiner
Board Director
Francis began his career in 1976 when he joined Llewellyn Construction Ltd as a management trainee. On 14 February 1983, he started with SDC as a Quantity Surveyor, initially working from a small office space at 30 Grove Place, one of several houses the company used as offices at the time. Over the course of four years, Francis contributed to projects for British Leyland and British Rail. By 1987, he had been promoted to Joint Surveying Manager, sharing the running of the department with Alan Angel, before becoming Chief Surveyor in 1989.
In 1991, Francis expanded his role by initiating the Special Projects Division. This initiative aimed to provide clients with a more comprehensive service offering, while generating additional income for SDC. His contributions earned him a place on the Board in 1994. Subsequently, he established Limegrove Supplies, which allowed the company to purchase certain materials at preferential rates and facilitated sales to the public as well as in-house use. In 1999, he was appointed Deputy Managing Director, and in 2004, he became Managing Director, as part of the transition to an Employee Benefit Trust (EBT).
During his tenure as Managing Director, Francis successfully navigated the company through numerous challenges, including the financial demands of the share purchase required to create the EBT and the global economic recession of 2008. Under his leadership, SDC completed several notable projects, resulting in significant growth in both turnover and net worth. During the Covid-19 pandemic, Francis prioritised safety while ensuring operational continuity, allowing the company to continue supporting its clients, including critical medical research facilities.
By 2021, SDC had modernised its infrastructure and strengthened its financial position. In September 2021, Francis transitioned to the role of SDC Chairman, marking a shift in his responsibilities while continuing to play an active role in the company’s strategic direction. His final major initiative as Managing Director was overseeing SDC’s golden jubilee celebrations, which raised more than £110,000 for charity, reflecting the company’s longstanding commitment to community support.
Francis will continue as Chairman of the SDC EBT for the foreseeable future.

Phil Doherty
Contracts Manager

Neil Sillitoe
Construction Manager

Phil Janes
Commercial Manager

Warren Foster
Design Coordinator

James Franklin
Services Project Manager

Jonathan Richardson
M&E Manager
After completing his A-Levels in Nottingham, Jonathan pursued an engineering apprenticeship at Leeds College of Building. This block-release programme integrated theoretical study with hands-on experience, enhancing his technical skills and problem-solving abilities. During his apprenticeship, he worked with a national MEP contractor, which gave him valuable industry exposure but ultimately highlighted his preference for a more collaborative and people-focused work environment.
A significant shift in Jonathan’s career occurred when his mentor invited him to join a regional family-owned MEP contractor in Nottingham. The role suited his collaborative working style, but the company later faced financial challenges during a recession, prompting him to explore new opportunities.
Having already collaborated with SDC as a subcontractor, Jonathan’s skills drew the attention of the company’s M&E Director. After his former employer’s closure, he joined SDC and was soon entrusted with leading its newly created M&E self-delivery department. Over 18 months, he assembled a team of professionals with subcontractor expertise, building a department now comprising 20 members, including trainees and project managers. This team operates with a focus on technical excellence and practical problem-solving.
In 2016, SDC supported Jonathan during a challenging period in his personal life. Faced with extensive travel demands and an expanding family, he raised his concerns with the company, which facilitated his relocation closer to its base. This adjustment improved his work-life balance and reinforced his commitment to the company.
Jonathan became a Director in January 2024. In this role, he is responsible for project delivery, tendering, preconstruction, and sustainability efforts, alongside overseeing the MEP department. His contributions have been integral to the successful delivery of complex projects in sectors such as Formula One, including work with clients like Aston Martin and Red Bull. He values the variety and problem-solving aspects of his role and is committed to fostering a culture of collaboration and continuous improvement within SDC.

Matt Wells
Planning Manager

Museum of Archaeology & Anthropology
This refurbishment involved stringent design criteria for temperature and relative humidity.