Whatever Brown's flaws, you look foolish if you are blaming the banking crisis and recession on him, when it originated in America and is very much a worldwide phenomenon!
Don't forget 'Dave' Cameron was calling for less regulation of the banking system!
I'm not blaming the recession on him, I'm blaming the massive amounts of state debt that will have to be paid back (if the country doesn't end up going cap in hand to the IMF) on him. Big difference.
As for the banking regulation, less regulation would have worked better, as would more regulation. The problem with the system put in place is that it was too restrictive to ensure market regulation worked correctly (although a big part of this problem comes from international accounting rules requiring the use of a cabal of credit rating agencies which destroyed their role in the market), and way too free to replace the natural market controls they had neutralised. They created a market failure due to the moral hazard that certain groups no longer had to compete for business and therefore their accuracy no longer mattered, and the implication that the governments approved of these groups and their practices.