City Diary: Emed Mining digs deep to cover Cyprus bank losses Readers of this Saturday's Sydney edition of newspaper Sing Tao will be comforted to see Pottinger, surrounded by his wife and four children, beaming down from an ad for Harry's Singapore Chilli Crab, one of Sydney's most upmarket eateries. You can take the chairman of the Foundation for Liver Research out of Mayfair... On the subject of testing one's liver, Simon Vardigans, former finance boss of Barracuda, is the new CEO of Heston Blumenthal's gastropub empire Fat Duck Group. Good news for Wall Street types keen to try the chef's snail porridge - plans are cooking to take the Dinner by Heston Blumenthal outlet to New York. Sunderland own goal? Oil, football and David Miliband. A potent mix, it turns out, as Invest in Africa, the not-for-profit organisation whose founding partner is Tullow Oil, has decided to review its shirt-sponsorship deal with Sunderland AFC, as endorsed by Miliband last June. Miliband resigned as vice-chairman of Sunderland on Sunday, over the ousting of manager Martin O'Neill in favour of the self-confessed fascist Paulo Di Canio. But the rethink of the "2012-13 season onwards" partnership is "unrelated to" the weekend's events, claims Invest In Africa, which was previously mustard-keen for brand exposure to the Premier League's global audience of 4.7bn. So why the cold feet over what Miliband called "the best commercial deal in Sunderland's history"? This one could go into extra time. An end of an era in more ways than one as Charles Heden hangs up his red braces after 42 years in fund management. Heden's favourite watering hole, easing the decades from Union Discount to Royal London Asset Management, has been the historic Simpson's Tavern on Cornhill. As if in sympathy with Heden's retirement, the 18th-century ale house recently announced that it was "closed until further notice, due to technical difficulties" - although staff tell Diary they hope to reopen as soon as possible. No doubt Heden will be back.