Ryanair chief executive Michael O'Leary on Monday admonished the U.K. government over its push to raise taxes on passenger flights, warning that the policy will see airlines move planes out of the country.

Speaking to CNBC's " Europe Early Edition " after reporting a significant upswing in first-half profit, the outspoken CEO described the Labour government's push to raise air travel taxes as counter to its strategy of kickstarting economic growth .

His comments come ahead of the U.K. government's high-stakes Autumn Budget on Nov. 26, with Finance Minister Rachel Reeves under pressure to resolve a fiscal conundrum over spending, taxation and borrowing.

Ryanair's O'Leary said there had been a trend of European governments rolling back "mad environmental taxes" and subsequently b

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