Goldman Sachs warns of possible restructuring of UK operations

Goldman made the remarks in a US regulatory filing on Thursday, the most concrete sign that one of Wall Street's biggest players could be directly affected by the landmark referendum vote.

The bank, which employs around 5,500 people in the UK, said that the result of the referendum and its subsequent knock-on effects "may adversely affect the manner in which we operate certain of our businesses in the European Union and could require us to restructure".

Former EU chief José Manuel Barroso was recently appointed chairman of Goldman Sachs' London-based subsidiary.

In the filing, the investment banking giant said Brexit will "likely change the arrangements by which UK firms are able to provide services in the European Union".

Other Wall Street banks have also given indications that the fallout from Brexit will affect their operations, including the likes of JP Morgan, whose chief executive Jamie Dimon told an Italian newspaper last month that it may “have to move some thousands of employees to other branches in the eurozone”.

“The framework of the UK’s engagement with the EU, including trade agreements, will be negotiated over a period of years. For the moment, we will continue to serve our clients as usual, and our operating model in the UK remains the same,” Dimon told staff in a memo.

Most banks have said that the possible inability of using the EU "passports" they have will make it difficult to conduct some operations within Britain.