The BBC should not seek to be impartial when it reports on Isis, the leader of the House of Commons, Chris Grayling, has said in response to the broadcaster's decision to continue referring to the terror group as Islamic State.

On Wednesday the director general of the BBC, Tony Hall, rejected demands from a cross-party group of 120 MPs including Boris Johnson and Alex Salmond to use the term Daesh in its coverage, arguing that it would breach the organisation's commitment to impartiality.

On Thursday Grayling told parliament that the broadcaster should act as a "beacon of fact" when covering threats to British security, as it did during the second world war.

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