The BBC's chairman acknowledged Monday that it was too slow in responding to allegations of bias over a misleading edit of a speech by U.S. President Donald Trump, but rejected claims that the British broadcaster's impartiality was being undermined from within its own board.

Senior BBC leaders were quizzed by the U.K. Parliament's Culture, Media and Sport Committee amid a major crisis at the publicly funded corporation after its director general and head of news both quit earlier this month and Trump threatened to file a billion-dollar lawsuit.

The BBC drew Trump's ire — and deep public scrutiny — after an internal memo compiled by one of its former external advisers was leaked to the British media.

The memo criticized cases of alleged biased reporting over a documentary on Trump that w

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