Jamie Oliver has re-ignited his feud with fellow celebrity chef Gordon Ramsay by accusing him of being 'deeply jealous ' of his success . The 39-year-old hit out at his Scottish rival after Ramsay criticised him for not attending the opening of his new restaurant - Jamie 's Italian - in Hong Kong . Ramsay , 48 , who previously opened his own Bread Street Kitchen in the Asian city , said Oliver could have 'at least turned up ' to unveil his new eatery . Scroll down for video . Jamie Oliver ( left ) has hit out at fellow celebrity chef Gordon Ramsay , claiming he is 'deeply jealous ' of his success . It comes after Ramsay criticised Oliver for not attending the Hong Kong opening of his restaurant . Oliver responded to the comments during a visit to open a new restaurant in Sydney , Australia , this week by claiming Ramsay was simply jealous . He said : 'Gordon will do anything to try and take the p**s out of me because he is deeply jealous and ca n't quite work out why I do what I do and why he ca n't do that . 'He is too busy shouting and screaming and making our industry look like a bunch of shouters and screamers . ' Oliver and his wife Jules have seen their fortune leap £90million to in excess of £240million with their restaurant chains , TV appearances and her childrenswear range . Meanwhile Ramsay 's fortune is said to be valued at more than £100million with his worldwide chain of restaurants . The pair have often made snide comments at each other , and it did n't stop this week when Oliver continued to criticise his rival over their books . Oliver 's 15th book , Save With Jamie , shot to the top of the UK bestsellers list upon its release , bringing his total number of book sales to just over 37million . In contrast , Ramsay has released 21 titles which have sold an estimate three million copies in total . Oliver said : ' I think that really , really annoys him . Ramsay is currently in the U.S. with his wife Tana and four daughters ( pictured at the Kids ' Choice Awards ) Jamie and Jools Oliver have an estimated combined fortune of more than £240million from their ventures . 'Book sales are about having a deep trusted relationship with the public . I really write my books . I do n't just turn up for the front cover . I write every word , every letter and I oversee every bit of design . 'You can sell a few books by luck or a moment ... but not 15 years and 37million books . That 's not luck . ' The two celebrity chefs - who both have four children - have previously clashed over their differing styles . In 2010 , while on a promotional tour of Canada , Ramsay said Oliver was 'just a cook ' while he proclaimed himself to be ' a chef ' . A year earlier , he admitted he was not a fan of Oliver , describing him as a 'one-pot wonder . ' He said : 'Everything kind of gets mixed in - hands in . It 's a very different style to me . He sticks it in the oven , comes back three hours later and it 's done . Chefs Oliver and Ramsay ( pictured together in 2006 ) have often exchanged fraught words over the years . Oliver made the comments during an appearance in Sydney , Australia , to open a new restaurant this week . 'We cook differently . I use basic ingredients taken up with a lot more excitement . 'But competition is healthy . It 's good to have that kind of rivalry . ' He also asked when he had last complained about a meal and answered : 'Last time I had dinner at Jamie Oliver 's restaurant . ' But Oliver has continued to stand his ground , and even praised the wife of Ramsay 's wife Tana . He said : 'If I was to choose between buying Gordon Ramsay 's cookbook or Tana Ramsay 's , it would be Tana 's every time . 'In my opinion , her books are a damn sight better than his . '
Jamie Oliver claims rival Tana Ramsay 's is 'deeply jealous ' of his success . Ramsay had criticised Oliver for not turning up to own restaurant opening . Scottish chef said Oliver could have 'at least turned up ' to event . Oliver , 39 , responded by claiming Ramsay , 48 , is annoyed by his success .