Jools Oliver has paid the sweetest tribute to her mum, Felicity, in honour of her birthday on Friday.Taking to her Instagram page to share a rare throwback snap of her mother with her daughter Daisy, the wife of celebrity chef Jamie Oliver gushed: "One of my absolute favourite pictures of my wonderful mum, happy happy birthday mum we are all so very lucky to have you as ours!"MORE: Jools Oliver shares precious throwback snap of daughters in emotional postWATCH: Jools Oliver declares love for