HBOS sacked and gagged a senior executive who four years ago warned the board of the bank that they were taking excessive risks, according to evidence given in Parliament.
Bank of Scotland (BoS) and BM Solutions have pulled their entire range of new business self-certification products.
HBOS pension fund trustees have decided not to delay the bank's takeover by Lloyds TSB.
Banks dived in early trading on Friday after a bleak trading statement from HBOS revealed the extent of its bad debts on mortgages and unsecured lending.
A tribunal will today hear a legal challenge to the merger of HBOS and Lloyds TSB from a group of customers and senior businessmen.
London's markets were dragged down by falling mining shares, which failed to lift as the day wore on. Shortly before 4pm, the FTSE100 had dropped 186.83 points, or 2.54% to 4,101.72.
HBOS received unwelcome press attention at the weekend as a Sunday paper caught 302 mortgage staff and 68 guests celebrating a "successful year" with a £330,000 five-star bash.
HBOS has delivered a swift rejection to a plan by two Scottish bankers to save the banking giant as a standalone entity.
St. James's Place shares soared almost 15% this morning as chairman Mike Wilson expressed confidence HBOS will retain its 60% stake in the wealth manager beyond the merger with Lloyds TSB.
Lloyds TSB chief executive Eric Daniels has moved to end speculation suggesting the Group's acquisition of HBOS would see Clerical Medical and Scottish Widows merge into a single entity.