The chief executive of Bradford & Bingley quit on Sunday and the embattled lender announced plans for an unscheduled trading update, less than a month after surprising investors with an emergency cash call.
Monday's statement from the country's largest buy-to-let mortgage lender is likely to warn on 2008 profits, rekindling concerns about short-term prospects for the bank and the wider mortgage market, amid rising arrears and bad debts.
It could also include news of a cash injection from U.S. private equity firm Texas Pacific, the BBC reported.
Quoting no sources, the BBC said late on Sunday that the U.S. investment firm would invest 150 million pounds in the mortgage bank to back existing plans for a 300 million pound rights issue, which could be trimmed.
The bank declined to comment on the detail of Monday's trading update or on the report of Texas Pacific's cash boost.
"We can confirm that, due to a serious cardiovascular condition, Steven Crawshaw is stepping down as chief executive with immediate effect," the bank said in a statement on Sunday.
Crawshaw, who joined the lender almost a decade ago ahead of its flotation, had been under pressure since B&B announced its bumper rights issue in May to bolster its balance sheet - a month after saying it had no plans to do so.
B&B said at the time it had waited for markets to stabilise before going ahead with the deeply discounted issue, but its shares have since tumbled over 40 percent.
Chairman Rod Kent will temporarily take over executive control of Britain's biggest buy-to-let lender, B&B said.
