March 6 (Reuters) - A consortium of investors in London

Stock Exchange Group ( LDNXF ) sold about 1.4 billion pounds

($1.78 billion) worth of shares in the London bourse owner, a

bookrunner said on Wednesday.

The consortium, which includes private-equity firm

Blackstone, Thomson Reuters ( TRI ) and other investors,

"executed a monetisation" of about 21.5 million shares in LSEG.

Thomson Reuters ( TRI ) is the parent company of Reuters News.

($1 = 0.7872 pounds)