Design Rationale Ltd is proud to have completed another project at Heathrow Terminal 5, reinforcing our reputation for delivering specialist architectural metalwork and glazing solutions in demanding transport environments. Working within a live operational airport setting, the project required the integration of bespoke architectural features, passenger-facing elements and carefully coordinated finishes to achieve a high-quality result that balances functionality, durability

Every year, the Design Rationale Limited team looks forward to one very special tradition: the annual barbecue hosted by Lesley and Robin Heap at their home. This year, site and office staff came together with their families for an afternoon filled with great food, games, laughter and plenty of friendly competition. With activities for kids and young adults, everyone had the chance to relax and enjoy time together away from the workplace. For Design Rationale, this is more th

In June, we proudly celebrated 34 years of Design Rationale Ltd marking over three decades of innovation, precision, and excellence. Founded 1992 Design Rationale Ltd has grown into a trusted specialist in architectural metalwork and glazing, delivering exceptional projects across the UK’s major transport hubs and some of the country’s most recognised infrastructure. June also marks the anniversary of Lesley Heap and Robin Heap beginning their journey within the company, thei

This June we brought colleagues together for another successful monthly wellbeing event, with both our site and office teams enjoying an energetic game of beach volleyball. We believe wellbeing is essential to building a strong, connected, and high-performing team. Our monthly wellbeing events are designed to encourage every team member to step away from their daily routines, connect with colleagues, and prioritise physical and mental wellbeing. As a specialist provider of ar

Design Rationale Ltd is proud to have successfully delivered specialist architectural glazing and metalwork at Heathrow Terminal 5. Operating within one of the UK’s busiest live environments required strategic planning, close coordination, and a commitment to safety and quality at every stage. Working to demanding programmes and restricted access windows, our Project Manager, Luke, and his dedicated site team ensured all activities were completed efficiently and with minimal

Our team recently swapped their desks for paddles, taking to the rapids for an enjoyable wellbeing event filled with laughter, teamwork and adventure. The weather certainly kept everyone guessing, with rain, hail, rainbows and sunshine all making an appearance throughout the day. However, nothing dampened spirits, and the team embraced every moment with enthusiasm and good humour. Wellbeing events such as these play an important role in bringing colleagues together, strengthe

We recently hosted an excellent on-site collaborative trade push-up challenge bringing together colleagues from across the project for a spirited and thoroughly enjoyable wellbeing initiative. Teams competed to achieve the highest number of push-ups within the allotted time, creating a splendid atmosphere on site filled with camaraderie, encouragement, and good natured competition throughout the challenge. Warm congratulations are extended to Megan Mechanical Services, who s

We are proud to have overseen the design, fabrication, and installation of the water management system at Victoria Station. A project that demanded exceptional technical precision, seamless coordination, and a refined approach to modern infrastructure delivery. The scheme was expertly led by our Design Director, Ben Cooper, whose considered design expertise and attention to detail ensured the successful execution of a solution tailored to the complexities of one of London’s

We recently designed, supplied and installed a bespoke curved glass screen at Heathrow Airport, within one of the UK’s most highly regulated and security-critical environments. Whilst curved glass screens are not uncommon, this project presented a unique challenge: the system was required to meet ASIAD compliance. As no off-the-shelf curved track systems had been tested to this standard, a bespoke solution was essential. Our approach began with an ASIAD-certified straight tra

Design Rationale Ltd is delighted to announce the appointment of Chris Smith as Projects Estimator. Chris joins us with considerable industry experience and a strong commercial background, further enhancing the expertise within our growing team. His knowledge and professional approach will be a valuable addition as we continue to deliver high-quality outcomes for our clients and partners. We are very pleased to welcome Chris to Design Rationale and look forward to his contri

At Design Rationale Ltd, April’s wellbeing event brought the team together for a fast-paced Ping Pong Challenge. The event encouraged friendly competition, teamwork, and a break from the daily routine. After a series of exciting matches, Louie emerged as our champion, taking the top spot with great skill and consistency. Thank you to everyone who participated and helped make the event such a positive and energetic moment for the team.

Design Rationale is delighted to celebrate Trevor Parkhouse, who has been formally recognised at a recent Mace Heathrow bi-annual workforce safety event attended by over 1,000 colleagues across day and night operations. The event brought together teams from across the programme to reinforce critical health and safety messaging, alongside valuable insights from Heathrow Airport and a guest speaker from Fire Safe Global, who emphasised the importance of curiosity, vigilance, an

In March, We proudly took part in the Optime Community Cup 2026, the distinguished 5-a-side charity tournament uniting teams from major airports across the country. Our team embraced every moment of spirited competition, camaraderie, and community engagement, with regional victors progressing to Wembley Goals and the chance to win a box at the FA Cup Final 2026. Beyond the game, we were honoured to support the Heathrow Community Trust, helping raise vital funds for the local

Design Rationale has taken a meaningful step in its sustainability journey with the installation of a solar PV system at its head office. As a construction company committed to low-carbon practices and energy-efficient solutions, investing in renewable energy was both a logical and strategic decision. The system is already making an impact - currently covering around 30% of office electricity usage by generating clean energy during peak working hours. With longer days and str

In March, Design Rationale brought the team together for a wellbeing afternoon dedicated to stepping away from the day-to-day and focusing on health, connection, and team spirit. The afternoon featured activities including rock climbing and badminton, encouraging everyone to get active, try something new, and support one another in a relaxed, social setting. Events like this offer real benefits. They help reduce stress, boost morale, and strengthen relationships across teams

Design Rationale are delighted to announce the successful completion of a remarkable project within Heathrow Terminal 3, finished in March 2026 after commencing in 2023. This distinguished undertaking saw the delivery of a wholly bespoke architectural metalwork and glazing package, defined by an elegant curved, full-height glazed installation. The result is a refined and contemporary feature that enhances both the aesthetic and functional quality of the space. The project dem

We were thrilled to host our February Wellbeing Event, featuring a company-wide Steps Challenge to encourage health, engagement, and friendly competition. We are delighted to announce that our team at Norman Shaw North, delivering the secondary glazing and metalwork package, Dobrin .D claimed the top prize with an impressive 443,772 steps and received a well-deserved cash reward. Special recognition also goes to our subcontractor, Alandale Group member who achieved a remarkab

In the 2015–2016 edition of The Parliamentary Review: A Year in Perspective , we were celebrated for our contribution to technically detailed projects across the UK’s infrastructure and construction sectors. A decade on, we continue to excel, combining refined architectural craftsmanship with advanced protective solutions. Over the years, we have been commissioned to deliver our solutions across major transportation hubs, prominent government establishments, international ai

installation works are currently underway at Boots in Manchester Piccadilly Station, where a bomb blast–resistant shopfront is being fitted. The project includes the precise installation of large 300kg laminated glass panels and a Blast tested sliding door system. The system is designed to withstand significant impact and blast pressures while maintaining the clear, refined appearance expected of a modern retail frontage. Installers from Design Rationale Ltd are presently man

We are delighted to announce that we have been presented with a Health & Safety Award by Mace Group in recognition of our contribution to the Heathrow Terminal 5 Transformation Project on the architectural glass and metalwork package, led by Project Manager Luke Carter, formally recognized in January 2026 for upholding exemplary standards of health, safety and wellbeing within a complex live airport environment. Working within an operational terminal demands careful planning,