The BBC is going to increase the number of LGBT people appearing in its programmes and news output as part of new diversity reforms.

They will be "incidental" portrayals, meaning that their sexuality is not part of a storyline or directly relevant to a news item.

Off-screen and off-air, LGBT staff will be encouraged to "bring their whole self to work" and be open about their sexuality.

Other recommendations include the use of non-binary pronouns used by staff where appropriate, and a network of "straight allies" who will announce their status with pin badges or special email signatures.

They are included in a new report based on a survey of LGBT staff attitudes, which found that many perceived the corporation to have a "heteronormative culture".

LGBT staff account for 11 per cent of the total BBC workforce and 12 per cent of senior staff. BBC bosses say they have acted to ensure they retain and attract the best LGBT talent as an employer, and to appeal to a younger audience as a broadcaster.

James Purnell, director of radio and education, said: "One of our big challenges currently is around young audiences.

"In a recent YouGov survey only 51% of 18 to 24-year-olds said they identified as completely heterosexual.