The external envelope for the building is composed almost entirely of glass.

The core cladding is expressed with very pale grey opaque glass vertical panels, whilst the main clear glazing to the offices is expressed as a multi-faceted and reticulated surface.

These diamond-like facades generate multiple complex reflections, capturing light and constantly changing in both pattern and appearance throughout the day. This highly modelled façade also acts as a deliberate counterpoint to the strong horizontality of the New Street Square building opposite, and is a subtle reference to the historic diamond dealing district of Hatton Garden.

Flanagan Lawrence is an award-winning, design-led architectural practice based in London. The practice has an impressive collective expertise across a broad range of sectors and building typology, including large-scale commercial projects and high-end residential schemes, as well as cultural, hotel and leisure, education, infrastructure, logistics, business parks and major masterplanning projects both in the UK and internationally. Flanagan Lawrence has worked with a diverse body of clients in both the private and public sectors. Public sector work has included performance space as well as office space and regeneration schemes. clients have included the Royal Welsh College of Music & Drama, Sadler’s Wells Theatre Trust, Soundforms plc ,The Sage Gateshead, as well as tertiary education client bodies such as Magdalen College, Oxford, Imperial College London and Brunel University. Private Clients have included Ask Property, Athos, BAA Lynton, British Land, Brookfield Europe, Candy & Candy, Chelsfield Development Securities, Espalier, Finchatton, Grainger, Great Portland Estates, Grosvenor, Herby Holdings, Land Securities, Londonewcastle, Muse Developments, Quintain Estates and Developments, Segro, and Sellar Property Group.

Doone Silver Architects is a London-based architectural practice. Established in 2010, the studio is led by Directors Richard Doone, John Silver and Ross Kerr, and has extensive experience in commercial, residential and hospitality sectors worldwide. With decades of personal experience, the individual Directors have consistently demonstrated an ability to challenge the preconceptions of a project to unlock exciting design and economic opportunities. Each project is approached without preconceived ideas. There is a clearly discernible pattern that links the work, a unity of thought and a robust rationale that can be identified in each design and that results from a close and enjoyable collaboration with clients and project teams. Their architecture takes an all-encompassing approach to the integration of form, structure, materials and light. Making places to pause and interact with the natural and built environment is an essential issue, together with the responsibility to provide a sense of positive civic engagement. Their projects always aim to minimise environmental impact and to optimise energy efficiency. Three of the most recent projects have all achieved BREEAM ‘Excellent’ ratings.