[1] Before construction, 25 Bank Street had been earmarked by Canary Wharf Group for occupation by Enron's European subsidiary.

This would involve the construction of five buildings providing a total of 3,300,000 sq ft (310,000 m2) of Grade A office space.

The building is designed around a central concrete core containing elevators, washrooms and services; this is surrounded by office floors with stainless steel and glass curtainwalls.

[2] On 3 April 2001, Canary Wharf Group announced that it had concluded a 30-year lease agreement with Lehman Brothers for the entirety of the space in HQ2, a total of over 1,000,000 sq ft (93,000 m2).

[4] The construction of 25 Bank Street was undertaken by Canary Wharf Contractors, with an overall build time of 32 months.

To protect the DLR, which continued to operate throughout construction, a concrete slab was installed above the railway that formed the base of the West Podium.

[7] Elevators engineering was undertaken by Lerch, Bates & Associates, Inc. A specialist lighting arrangement was installed to illuminate the crown of the building.

This was designed by LightMatters and involved a total of 5,472 LED fixtures installed between the inner wall and the outer glass shell of the building's 32nd level.

Following a deterioration in LBHI's financial position, on the afternoon of Sunday 14 September 2008, the directors of Lehman Brothers International (Europe) Ltd (LBIE) sought assurances from LBHI that payments due to be made on its behalf on the following business day would be made.

[11] PricewaterhouseCoopers were appointed as administrators of the UK business and as part of this task took over the management of 25 Bank Street.

These subleases were due to expire in March 2011; in the event, Nomura would exercise a break option in September 2010 and exit the building at that time.

[12] A further 126,000 sq ft (11,700 m2) was sub-let to other tenants, including the Financial Services Authority, land agents Jones Lang Wootton and NYSE Euronext.

From 1 January 2010, Lehman Brothers (in administration) reduced its occupation of 25 Bank Street to 290,146 sq ft (26,955.4 m2); and from 31 March of that year exited the building entirely,[12] moving to new premises at 25 Canada Square.

J.P. Morgan also announced that it had reached agreement with Canary Wharf Group to fund a further tranche of development to its Riverside South scheme.