Not one of GB's finest moments but let's not forget that he has gone on record to admit his mistake.
"BBC Article: Gordon Brown admits 'big mistake' over banking crisis"
Thatcher and thatcherites on the other hand won't admit that her de-regulation of London's Banking System has played its part in the 2007 global financial crisis.
Except of course for Nigel Lawson, Thatcher's Chancellor at the time, appearing on the Analysis program in 2010, to discuss banking reform, explaining that the 2007global financial crisis was an unintended consequence of her de-regulation of the banks"
