The head of JP Morgan Chase authorized on a significant three billion pound headquarters building in the UK capital after assurances from government representatives about pro-business policies.
The major US bank, which together with Goldman Sachs revealed substantial investment plans right after being spared tax increases in the UK government's financial statement, formally signed off the previous week.
This approval was preceded by a meeting to New York by a top business adviser, who held discussions with Jamie Dimon to discuss commitments about the government's policies.
The discussions took place shortly prior to the government disclosed revenue-raising measures in a financial statement that protected financial institutions from higher levies, in response to substantial advocacy from the banking industry.
"The project ... would probably not have been announced if this financial plan had been seen as against business interests."
On Thursday morning, JP Morgan revealed plans to construct a substantial tower in London's financial district, which will function as its primary British base and host the majority of its London employees.
The financial institution highlighted that the investment would depend on "favorable economic conditions in the UK".
The financial institution has stated that the project could generate £9.9 billion to the British economy over the coming half-decade.
The government official stated she was thrilled about the project, referring to it as a "multibillion-pound vote of confidence in the British economic prospects".
A source familiar with the development project said that the decision to invest was "influenced by various considerations" and that "uncertainty remained whether banks were going to be facing higher charges before the financial statement".
The JP Morgan chief stated that the "British authorities' focus of economic growth has been a significant element in influencing our this determination".
A second financial institution revealed that it would increase its Birmingham office and recruit new employees, in a strategy that would more than double its workforce in the UK's second biggest city.
The authorities had considered raising the bank levy in the UK, as it considered ways to raise revenues after opting not to implement higher personal taxation, but eventually determined not to do so.
Financial institutions in the UK are subject to a 28% corporation tax rate, being higher than the normal rate, as well as a additional charge on their British operations.
Digital marketing strategist with over 10 years of experience in SEO and content creation, passionate about helping businesses thrive online.