Peter Mandelson lobbied Tony Blair for alleged paedophile Lord Janner to receive a peerage, it has been claimed.

Janner, 86, was elevated to the House of Lords six years after being publicly accused of child sex abuse in a high-profile court case.

The Labour grandee, who escaped historic child sex abuse charges last month because he has dementia, has also boasted how his ‘friend’ Gordon Brown helped him get into the Lords.

It meant Janner was one of the first peers appointed by Mr Blair after his landslide election victory in 1997.

The claims will raise fresh questions about how the Labour Establishment responded when the abuse allegations against him first emerged in 1991.

Janner described in his 2006 autobiography To Life! how he decided to stand down as MP for Leicester West after his wife Myra was diagnosed with cancer in 1994.