LONDON (Reuters) - An acrimonious Brexit, in which Britain declines to honour its existing financial obligations could put pressure on the European Union's 'double A' rating, S&P Global said on Monday.
Having recently triggered the EU exit process, Britain's government is facing a request from the European Commission to honour its existing financial obligations, which reportedly could reach 60 billion euros.
S&P said the claims were unlikely to be legally enforceable however, and that the EU's rating could suffer if the UK didn't stump up the money.
"The European Union (AA-Stable/A-1+) ratings could come under pressure in an adverse scenario," S&P said.
"This is because our ratings on the EU are to a certain extent predicated on our expectation that the UK would honour its share of financial obligations to the EU."
It said a non-payment of obligations would not constitute a default by Britain.
The ratings of a handful of multilateral lenders the UK pays into could also come under pressure, S&P Global said.
Multilateral lenders including the European Investment Bank, the Inter-American Development Bank, Council of Europe Development Bank, African Development Bank, and Eurofima could all see their ratings reviewed.
Reporting by Marc Jones, editing by Nigel Stephenson