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Sir Sadiq Khan has been criticised after embarking on a 12,000-mile round trip to Brazil to attend a climate change conference - his fifth foreign trip of the year.

The London mayor has flown with City Hall aides to the “magical city” of Rio to attend the “biggest-ever gathering of mayors” at the C40 summit, a regular gathering of city leaders committed to responding to the “climate emergency”.

Research by The Standard found Sir Sadiq will have clocked up a total of 27,572 air miles this year by the time he returns to the capital at the end of the week - the equivalent o

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