The Green leader of Brighton & Hove City Council has apologised and admitted an error of judgement after he flew to the Cop26 summit in Glasgow.
Phelim Mac Cafferty said he had flown to the summit due to concerns over the "unreliability" of the rail network.
Many Cop26 attendees had become stranded at Euston Station following bad weather.
He told The Mail:
"This decision to fly was a major failure of my judgement which goes against my political group's pledges and principles and I unreservedly apologise."
Mac Cafferty had been invited to represent the city at a presentation of the Glasgow Declaration on Saturday morning.
Responding to the criticism of his "hypocritical" travel arrangements, he told Brighton's The Argus:
"I felt it was important not to miss the opportunity to attend the important presentation on behalf of the city, lobby world leaders and share with others the innovative work taking place in Brighton & Hove."
In a statement he said:
"I paid for my own transport and all associated costs. I am not getting paid for any of the speeches I am making or meetings I am attending and I am otherwise working from Glasgow."
He has faced calls to quit various local MPs.
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