FRANKFURT/LONDON (Reuters) - Morgan Stanley MS.N has chosen Frankfurt to be a new base for its European Union operations as Britain prepares to leave the bloc, according to a source familiar with the matter, becoming the latest U.S. bank to pick the German city.

FILE PHOTO - A view of the Morgan Stanley London headquarters at Canary Wharf financial centre in London, Britain June 24, 2016. REUTERS/Russell Boyce/File Photo

International banks are planning to set up subsidiaries in the EU to ensure they can continue to serve clients if their London operations lose the ability to operate in the EU after Britain leaves in March 2019.

Morgan Stanley is planning to use its Frankfurt subsidiary as the center for its EU trading operations, according to the source.

“That means 200 new people will be coming to Frankfurt,” the source said.

But the bank is likely to spread some of its operations across the EU, with its asset management business expected to go to Dublin. That pattern is likely to be followed by many banks - picking one EU center to be their main regional subsidiary in the bloc but then locating other parts of their businesses in several countries.

A spokesman for Morgan Stanley declined to comment. The news was first reported by the Press Association.

Details of banks’ Brexit arrangements are starting to emerge following a July 14 deadline for them to submit details of their contingency plans to the Bank of England .

Citigroup C.N is expected to announced officially this week that it will also be using Frankfurt as its new EU base, while Barclays BARC.L said on Friday it was in talks with regulators in Dublin about expanding its operations there.

Morgan Stanley’s choice was expected, with a source telling Reuters in January that the bank was likely to move jobs to Frankfurt after Brexit, given it already had a licensed entity there.

JPMorgan CEO Jamie Dimon said on July 11 that his bank would probably use Frankfurt as the legal domicile of its European operations after Brexit, but that jobs may be put elsewhere as well.

Banks are pushing ahead to implement the first stages of their Brexit contingency plans, warning that they do not have time to wait to see the outcome of Britain’s exit discussions with the EU.

Most are currently focused on ensuring they have the right legal and operational structures in place, holding back on plans to move hundreds of staff until the final Brexit deal is clearer.

Frankfurt is so far looking to be the most popular choice for banks’ post-Brexit centers.

Japanese banks Nomura 8604.T, Daiwa Securities 8601.T and Sumitomo Mitsui Financial Group 8316.T have all said they are planning to set up new units there, as has British lender Standard Chartered STAN.L.