May 3 (Reuters) - The following are the top stories in the Financial Times. Reuters has not verified these stories and does not vouch for their accuracy.

Headlines

* French regulator orders Engie to raise gas prices for companies (http://bit.ly/1VHywxL)

* Barclays' risk officer in France alleges laundering and mis-selling failures (http://bit.ly/1TGLWXv)

* Brexit 'could boost eurozone GDP'

(http://bit.ly/1rOTFtN)

* Milan stock exchange rejects Popolare Vicenza listing

(http://bit.ly/1SHBMqo)

Overview

* France's competition authority ordered Engie to raise its natural gas prices for companies, saying that in some cases the energy company utility was engaging in "predatory pricing" and harming competitors.

* Philippe Hebert, chief risk officer of Barclays France, has alleged money laundering and mis-selling failures at the bank in a letter written to Tony Blanco, chief executive of Barclays France, which was seen by the Financial Times.

* Eurozone economies would benefit at the cost of Britain if it decided to leave the European Union, a prominent French economist has predicted, with a relocation of financial activity out of London causing sterling to plummet.

* The stock market in Milan said it could not allow regional lender Popolare di Vicenza to list after it failed to find sufficient buyers for its 1.7 billion euros ($1.96 billion)capital raising.

($1 = 0.8679 euros) (Compiled by Shivam Srivastava in Bengaluru; Editing by Sandra Maler)