Clive Lewis a Labour MP for Norwich South, was once a senior broadcast journalist and the main reporter on the BBC’s Politics Show East.
Mr Lewis spoke at a Momentum rally in September of last year, and his comments were unearthed in a secret recording, and will come as a huge embarrassment to the BBC, which has already been criticised numerous times for its perceived bias.
He said: ‘I was able to use bias in my reports by giving less time to one than the other.
‘I reported on both but the angle and words and the language I used — I know the pictures I used — I was able to project my own particular political positions on things in a very subtle way,’ which was reported by the Sun on Sunday.
Tory MP Damian Collins said: “He’s boasting about undermining one of our great institutions.”
A spokesman for Mr Lewis declined to comment. A BBC spokesperson said: “Our editorial guidelines ensure impartiality.”