Thousands of rail commuters faced travel problems as they returned to work after the Bank Holiday break.
Over-running engineering works meant First Capital Connect services from King's Lynn through Cambridgeshire and Hertfordshire into London were badly hit.
Click below to watch a report by ITV News Anglia's Olivia Paterson
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Warm sunny spells today remaining dry
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Douglas Carswell told ITV's Peston On Sunday he wanted to "support" the government as a "critical friend" but refused to rule out a return.