LONDON (Reuters) -Heathrow Airport, Britain's busiest hub, reported a smaller annual loss on Thursday, as it continues to recover from the pandemic, but said underlying profitability was impacted by inflation and lower passenger numbers. For 2022, Heathrow's adjusted loss before tax narrowed to 684 million pounds ($825.04 million) from the 1.27 billion pound loss it made in the year earlier period, which was affected by pandemic travel restrictions. Heathrow, which is owned by Spanish group Ferrovial and Qatar Investment Authority plus other investors, said no dividends were paid in 2022 and none were planned for 2023 as its financing remains conservative.