The BOE last year commissioned it's own internal investigations into alleged rigging of the much needed liquidity auctions held in 2007-2008 in the heat of the banking crisis

The findings were referred to the SFO who's own investigation is now underway

Andrew Tyrie MP, chairman of the House of Commons Treasury Select Committee, said that the referral was the "right thing to do".

We must now await the outcome of the SFO's work.The sooner their findings are published, the better

The SFO simply confirmed it was

investigating material referred to it by the Bank of England concerning liquidity auctions in 2007 and 2008.

The BBC carries more here