The former RBS office will be remodelled internally to provide 200,000 sq ft of high-specification Cat A space, including provision of a new entrance and open plan reception area.

The eight-storey building will be systematically stripped out, enabling ISG to reconfigure the ground floor space and seven levels of office accommodation.

Structural alterations will be made at ground floor level, with the partial infill of the existing atrium, to create a spacious and contemporary reception, with open plan break out areas, informal meeting space and new retail units.

A feature entrance with a new steel portal is set to enhance the building’s visual appeal.

The project includes the upgrade of mechanical and electrical infrastructure and the installation of new generators to ensure resilience for new tenants.

The project location is close to ISG’s head office in Aldgate and reflects the continuing demand for high-specification office accommodation in the area.

Stuart Deverill, ISG’s Southern regional managing director, said: “Office construction activity within the immediate vicinity of our head office has significantly increased over the past six months and really highlights the strong levels of occupier demand in this area.

“This latest win reinforces our market leading position in complex office refurbishment and fit out, and we’re delighted to be working with Derwent London to maximise the value of this key property asset.”