His comments come amid heightened scrutiny of travel’s environmental credentials owing to the Cop26 climate summit in Glasgow.
Prime minister Boris Johnson, who was roundly criticised for flying back to London from the summit, is reportedly preparing to return to Glasgow – by rail – to contribute to efforts to hammer out a deal to cut or limit carbon emissions.
Net zero emissions has been a widely cited target at Cop26, with an ultimate aim of limiting global warming to 1.5C.
Late on Tuesday (9 November), Johnson said it was time to "pull out all the stops". The conference will run until Friday (12 November).
