I talked at the end of the month at Derbyshire Dot Net . It was a first for me in the sense that I have never delivered someone elses talk. The talk was originally scheduled to be Andrew Bullock but I had agreed to cover it. It was an interesting experience but I think the topic was general enough for anyone au fiat with the main points to deliver. Especially as I am a keen proponent on many of the points made in the talk. Anyway, the crowd was either pleased or very understanding (I'll take the former thanks) and the evening was hosted in an excellent pub called the Brewer Tap which definitely help take the edge off any nerves I had. The slides for the talk are here: http://slides.com/trullock/writing-robust-systems-4#/ (I can't take any credit for them but I thought they were excellent slides by Andrew).