The three former NatWest bankers’ guilty plea to a fraud charge in the US is a sign that the fall of Enron is still sending shockwaves through the business community.

At the heart of the men’s plea is an admission that they conspired with Andrew Fastow, Enron’s disgraced former chief financial officer, to make a $20m profit (£9.7m at today’s exchange) on an investment illegally, and to divide the proceeds between them.