Thanks Nick. It's a salute to incredible stupidity on the part of the "leaders." It was the first time the tank was used, but it was used in what mainly was a demonstration. The Germans got the message and started using tanks too. The Brits lost their advantage. If the British had paid attention to Churchill, who invented the tank, and had produced them in quantity the outcome of the Somme offensive might have been very different.
Very sad stuff.