Spanish bank Santander has denied speculation that it is planning to make an offer for National Australia Bank's UK business. A report in The Australian, based on Dow Jones Newswires, quoted a Santander spokesman saying the bank was focused on organic growth for its UK operations.Fairfax Media quoted a spokeswoman saying Santander UK had denied it was in talks with NAB.Coverage included comments from banking analysts, saying they would like to see NAB sell the UK businesses. Fairfax quoted Nomura banking analyst Victor German, who said: "I think the amount of time that management has to divert into the UK assets and also the resources that have to go into managing this business are probably not worth the upside."The Australian ran comments from Stan Shamu, an analyst at IG Markets, who said: "It's been an under performing asset for some time and it's really held back a lot of investors from investing in NAB."The Australian Financial Review quoted Citi analyst Craig Williams, who said: "Shareholders would welcome the absence of management distraction and the ongoing dilution to group returns that the UK retail business represents."