Global investment banks and large corporations have used London as a European base for years, thanks to low-ish taxes, proximity to the mainland, and, of course, an English-speaking workforce. For the thousands of banking employees there, Thursday’s referendum to leave the European Union complicates matters and threatens jobs, since it would no longer make sense for a non-EU country to be a hub for EU business.

In internal memos, JP Morgan CEO Jamie Dimon and Goldman Sachs CEO Lloyd Blankfein wrote to calm their 16,000 and 6,000 employees whose jobs are at risk of layoffs and moves across the Channel. The CEOs remind employees that this vote did not signify an instant change, but that a lengthy process to increased isolation will begin.

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Blankfein tersely noted Goldman’s ability to weather change and stated a commitment to the people involved, as did Dimon. The JPMorgan CEO, in his longer memo, noted that bank would stay in the UK to work with local clients (emphasis ours), which would suggest paring down the large, global European market to a smaller British one. Dimon also expressed hope that future trade deals would see value in UK and European engagement. Here are the memos, via Business Insider.

Blankfein’s memo:

As you may have seen by now, the British people have voted to leave the European Union, and we respect this outcome. We have had a strong team focused on this potential result for many months. There is no immediate change to the way we conduct our business. A process of negotiating the terms of the exit will now begin, and is expected to take a considerable period of time. Goldman Sachs has a long history of adapting to change, and we will work with the relevant authorities as the terms of the exit become clear. We are committed to our people and our clients, and will work diligently to ensure the best possible outcome. We will continue to communicate with you as relevant information becomes available. Lloyd C. Blankfein Gary D. Cohn

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Dimon’s memo: