Live Nation Entertainment Inc., the world’s biggest concert promoter following a merger with Ticketmaster Entertainment Inc., won United Kingdom antitrust approval of the deal following a second court-ordered review.

The Competition Commission signed off on the merger Friday in London, saying it “would not result in a substantial lessening of competition in the market for live music ticket retailing.” In February, a tribunal ordered the regulator to reopen the case after a competitor appealed.

Live Nation, based in Beverly Hills, won U.S. antitrust approval of the $899 million merger in January, after almost a year of review. The deal combined the world’s largest ticket retailer with the biggest promoter of concerts.

U.K. regulators first signed off on the deal in December after resolving competition concerns in the British market. The Competition Appeal Tribunal, which reviews U.K. antitrust decisions, ordered a review of the case in response to an appeal by CTS Eventim AG, which had signed an agreement with Live Nation to handle ticketing for U.K. concerts.

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