Boris Johnson said the "Olympo-sceptics" were proved wrong by success of the London 2012 Games after it was announced the Olympics gave the UK economy a £9.9 billion boost.
The Mayor of London said the country would now "defy the doom-mongers" when it comes to securing a permanent Olympic legacy.
"London is succeeding where virtually no other host city has, on track to secure a solid gold payback on the taxpayers' outlay and a rosy future for the Queen Elizabeth Olympic Park", Mr Johnson added.
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Jeremy Corbyn has insisted his policies will persuade enough people to vote Labour at the next election to return the party to power.
The controversial procedure involved nuclear DNA from the mother, mitochondrial DNA from a donor, and the father's sperm.
The move comes amid a boycott of the paper in Liverpool due to its controversial coverage of the 1989 Hillsborough disaster.