The former Wellingborough Grammar schoolboy started his career at Anglia Television in 1960. But bosses did not renew his contract because they did not think he was cut out for a career in TV.
Click on the link below to here Sir David talk about his time on About Anglia in September 1964.
More top news
Over 740,000 adults aged 40-60 in our region do not achieve ten minutes of continuous brisk walking over the course of a month.
Six people - aged between 16 and 28 - have been arrested over two stabbings in Newmarket earlier this week.
The NSPCC is referring a record number of reports of neglect to police and social services - including a massive increase from this region.