AI software firm Boltz takes Kings Cross office building to full occupancy
Clearbell UK Strategic Trust (CST or Clearbell), a Trust advised by Clearbell Capital, has fully let 6-24 Britannia Street in King’s Cross’ Knowledge Quarter with AI software company Boltz joining as the building’s final tenant.
Boltz has agreed a new three-year lease for the 3,848 sq ft first floor, taking a newly fitted, fully refurbished and furnished CAT A+ workspace. The letting follows Clearbell’s repositioning of the former commercial art gallery into a modern, high-quality office building.
The deal reflects the continued strength of demand from artificial intelligence and technology-led occupiers for workspace in King’s Cross, which is increasingly being viewed as one of London’s most important innovation and technology districts. Boltz’s move follows a wave of AI and technology businesses committing to the area, drawn by its access to talent and proximity to the capital’s wider knowledge economy.
Boltz is developing AI-powered molecular modelling tools for biology and drug discovery, with a focus on open science and making advanced AI capabilities more accessible to scientists. Its technology is designed to help accelerate scientific research, including small-molecule and protein design, supporting the development of new approaches to drug discovery and life sciences innovation.
A recent transformation of Britannia Street, designed by Stanton Williams and delivered by Virtus, has modernised and enhanced the whole building’s functionality and amenities. The fit-out created 15,000 sq ft of premium space, with a new timber mezzanine bringing increased space, and Crittall-style windows enhancing natural light and insulation.
Energy upgrades to lighting and air conditioning have also helped the space achieve an EPC A rating. Modern WCs, showers, bike storage facilities and a courtyard further enhance the occupier experience.
Britannia Street is located close to King’s Cross station, providing businesses with convenient access to one of the city’s best-connected transport hubs. Boltz joins existing occupiers including global publishing company Thames & Hudson.
Ben Tolhurst, Asset Management Director at Clearbell Capital, said: “It’s great to welcome Boltz to Britannia Street, marking the final letting at the building and a significant milestone for the asset.
“King’s Cross is increasingly cementing its status as one of London’s most compelling technology and innovation districts, attracting fast-growing businesses operating at the intersection of AI, life sciences and research. Boltz’s decision to take space at Britannia Street reflects the demand from these occupiers for high-quality and sustainable workspace in the capital.
“Britannia Street has been carefully repositioned to meet the needs of today’s businesses, and we are pleased to see that vision reflected in the calibre of occupiers it has attracted.”
