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Video: Election results for Thanet North and South
Dr Ladyman had earlier admitted that defeat at the polls would probably spell the end of his political career.
"The real test of dignity is in losing power," he said.
And he fought back tears as he added: "It's been an honour to have served as the MP for South Thanet for the past 13 years. It's been a challenge at times, but it's always been a privilege."
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