Jonathan Pierce at Credit Suisse — itself in the wars over structured debt obligations — thinks that Barclays is facing a near £10 billion ($20bn) of losses if it follows Royal Bank of Scotland in adopting a conservative estimate of its mortgage assets.

RBS declared £5.9 billion ($12bn) last week and has opted for a £10 billion request for cash from its shareholders.

Barclays will, we understand, keep its losses confidential.

It looks like blue-chip Barclays will be the next major bank to announce a rights issue, or look for outside investors, possibly from the sovereign wealth funds of the Middle East or Far east.