As revealed by The Grocer two weeks ago, he will resign the Labour whip and take up his new position on 27 July, replacing Dame Deirdre Hutton.
"I am very pleased to have been offered this position, particularly as I was involved in setting up the Agency in the late 1990s when I was a Minister at the Ministry of Agriculture, Fisheries and Food," he said. "It is vital we have an independent, non-ministerial department responsible for food safety, which is open and transparent. I am excited about my new role and look forward to joining the Agency, which bases its work on science and puts consumers' interests first."
Lord Rooker had been due to become president of the Royal Association of British Dairy Farmers, but Lady Byford will now resume the position.