US president-hopeful Mitt Romney provides the perfect example of how easy it is to make a gaffe, and go on causing offence. Carol Grant explains what senior managers and politicians can learn from his mistakes.

The word 'omnishambles' was first yelled at a hapless minister by malevolent spin doctor Malcolm Tucker in TV's The Thick Of It. It's become common usage and has even been adapted as the hashtag #romneyshambles on Twitter to describe Mitt Romney's gaffe about London 2012.