By Maria Armental 

Standard & Poor's Global Ratings stripped the U.K. of its pristine triple-A credit rating on Monday, warning the country's vote to leave the European Union will lead to a less predictable, stable, and effective policy framework.

The firm, which cut the country's ratings by two notches to double-A, also said the vote for "remain" in Scotland and Northern Ireland creates wider constitutional issues for the country as a whole.

The moves comes after rival firm Moody's Investors Service lowered its outlook on the U.K.'s credit rating to negative from stable on Friday. But Moody's affirmed the U.K.'s rating at Aa1, the second highest available.

Write to Maria Armental at maria.armental@wsj.com

(END) Dow Jones Newswires

June 27, 2016 14:12 ET (18:12 GMT)