Who said, and when?

Who said "It is difficult to think how much lower our collective reputation might sink" and when?

It was Frank Field, in January 2008. The quote is from a BBC report at the time. (Hat tip to Liberal Vision for that one.) The occasion was the outing of Derek Conway's little scam. For more details of that, go to A Man For All Sleazons, and scroll down (you'll have to scroll a fair way to get past all the other Tory crooks.