By Matt Scuffham and Steve Slater
LONDON (Reuters) - Royal Bank of Scotland (RBS)
However, McEwan played down comments from UK Business Minister Vince Cable suggesting it was inevitable the bank would relocate its headquarters from Edinburgh to London in the event of a "yes" vote.
"It's really important that the Scottish people get the opportunity to vote, and then if I need to adapt my business to serve England, Scotland, Wales and both the Republic of Ireland and Northern Ireland, then I will," McEwan said in a Q&A on the website of the Guardian newspaper.
"Mr Cable and I have not talked about moving our head office," he added.
McEwan's comments followed reports that Britain will warn Scots that they cannot have a currency union with the rest of the United Kingdom if they vote for independence in a September referendum.
RBS, Bank of Scotland-owner Lloyds Banking Group
Industry sources told Reuters on Tuesday a key part of contingency planning is what they will do in the event of a currency union not being agreed. One source said an option for financial services firms based in Edinburgh would be to relocate their registered offices to London but retain operations in the Scottish capital.
RBS, Lloyds and Standard Life
McEwan also said RBS would pay bonuses to help retain top bankers, despite analysts expecting the bank to report a loss of between 7 billion pounds ($11.5 billion) and 8 billion for 2013 later this month, its sixth successive annual loss.
(Editing by David Holmes)