In Brief: Oliver says sorry to Sainsbury’s

Jamie Oliver has apologised to Sainsbury's for criticising the supermarket - which spent £5m on TV advertising fronted by Oliver over Christmas - over refusing to take part in a televised debate on the standards of battery chickens; Oliver has written an open letter to every member of staff at Sainsbury's... David Beckham says he would be honoured to help England's 2018 World Cup bid, should he be asked by the Football Association; Beckham signalled his interest as he showed PM Gordon Brown around his Football Academy in London... Meanwhile Tory leader David Cameron joined boxer Amir Khan, who was fined earlier this week for driving 140mph on a motorway, to open a gym in Bolton... Sir John Harvey-Jones, the flamboyant former chairman of chemicals giant ICI, has died, aged 83; he became best known to the public for his BBC show Troubleshooter, in which he advised struggling businesses... Oprah Winfrey and Robert de Niro were among those who went along to see singer Chaka Khan make her debut in The Color Purple musical on Broadway. Oprah and Whoopi Goldberg appeared in the 1985 film version of Alice Walker's book... Movie mogul Harvey Weinstein has delayed his honeymoon with new wife Georgina Chapman so he can chase Oscar votes... Tennis champion Serena Williams has poured her heart out in an extraordinary blog after a painful breakup; "Tears finally come and they make you feel a little better," she writes, "but the pain is piercing through your soul... You can't help but feel hopeless, foolish. Your great chance to be with your soulmate has again somehow slipped and failed"...