Facebook is continuing to be evasive in its answers to a British parliamentary committee examining a scandal over misuse of the social media company's data by Cambridge Analytica, the committee's chair said on Friday.

Britain's digital and media committee is examining fake news, and what the consultancy, employed by Donald Trump's 2016 US presidential campaign, did with the Facebook data, which was improperly obtained.

Cambridge Analytica said it deleted the data when asked and did not use it in Trump's campaign. It also denies doing paid work on the campaign for Brexit.

"Facebook continue to display a pattern of evasive behaviour – a pattern which has emerged over the course of our inquiry", chair Damian Collins said in response to Facebook's latest letter to the committee, saying its answers over how it monitors political advertising and its resources devoted to security were inadequate.

"The company appears to prefer minimal over rigorous scrutiny... We will be addressing this point as part of our interim report being published in due course."