The head of JP Morgan Chase signed off on a substantial £3 billion headquarters building in London following commitments from UK government officials about pro-business policies.
The Wall Street banking giant, that together with another major bank disclosed significant expansion projects hours after avoiding higher taxes in the Treasury's autumn budget, only gave final approval recently.
This approval followed a visit to New York by the prime minister's envoy, that conferred with the banking executive to offer guarantees about the business environment.
The meeting happened days before the Treasury revealed significant tax increases in a budget that exempted banks from higher levies, after significant pressure from the banking industry.
"The investment ... would likely not have proceeded if this economic statement had been perceived as anti-prosperity."
On this week, the banking giant revealed plans to build a 3 million square foot headquarters in Canary Wharf, which will function as its new UK headquarters and accommodate the majority of its London employees.
The financial institution emphasized that the investment would rely on "a continuing positive business environment in the UK".
The financial institution has projected that the project could contribute £9.9 billion to the national economy over the following six-year period.
Chancellor Rachel Reeves expressed enthusiasm about the development, describing it as a "multibillion-pound vote of confidence in the British economic prospects".
A representative aware of JP Morgan's building plans said that the investment choice was "based on multiple factors" and that "it was impossible to predict whether banks were going to be facing higher charges before the announcement".
Jamie Dimon remarked that the "British authorities' focus of financial development has been a key consideration in supporting our this decision".
Another major bank revealed that it would enlarge its Midlands operation and hire 500 staff, in a initiative that would significantly increase its workforce in the Britain's second largest metropolitan area.
The authorities had examined raising the bank levy in the UK, as it considered ways to raise revenues after deciding against additional income levies, but finally concluded not to do so.
Banks in the UK currently pay a higher corporate tax level, that is higher than the typical percentage, as well as a distinct tax on their British operations.
Certified Scrum Master with over 10 years of experience in leading Agile transformations and coaching teams to success.