 UKs competition watchdog said on Thursday it is offering ticket reseller Viagogo and Stubhub a weeks time to submit proposals addressing the regulators concerns over Viagogos 4.05 billion deal for the ticketing unit of U.S. e-commerce firm eBay Inc. The Competition and Markets Authority CMA has given Viagogo and Stubhub until June 18 to offer an undertaking to its concerns that the deal could result in substantial lessening of competition in the United Kingdom. 