Line of Duty's Vicky McClure reveals Twitter 'slip-up' as she admits fears of revealing 'H'

Line of Duty actress Vicky McClure opened up about the moment she almost slipped up on Twitter with a flippant tweet.

The star, who plays DI Kate Fleming in the BBC series said that she often fears that she will accidentally reveal a spoiler she shouldn't.

Asked by host Phillip Schofield whether she would be glad once the latest series of Line of Duty was over, she said: "I'll be able to talk about it freely and not worry about spoilers because even with social media you don't want to put anything on."

She added: "I put a picture of Stephen Graham (who plays John Corbett) and they're all like 'What!?!'

Vicky McClure appeared on This Morning today - but refused to let slip any spoilers (ITV)

Vicky plays DI Fleming in the hit BBC series (BBC/World Productions)

Line of Duty actor Adrian Dunbar confirms 'H' will be exposed as he teases identity

"I was like, 'I don't comment on social media'. It's so hard!"

Earlier, host Holly Willoughby asked whether viewers would find out who 'H' is in the final episode.

"You'll get a 90 minute special is what I'm going to say," Vicky grinned.

The actress spoke to Holly Willoughby and Phillip Schofield (ITV)

Vicky refused to reveal any information about the finale (BBC/World Productions)

A frustrated Holly responded: "I know that by looking at my TV [guide]!"

"There's no point," Vicky explained. "I've got this far without saying anything."

"I know," Phil responded. "I'd hate it if you did."

Fans are convinced that 'H' is not Hastings and there are still tons of questions that still need to be answered ...

Will we finally discover the truth next Sunday?

*This Morning airs weekdays at 10.30am on ITV