Well, I definitely have a copy!

The publishers have it up for sale, with a November 3rd release date: http://www.pen-and-sword.co.uk/Destructive-and-Formidable-Hardback/p/7907 Sometimes the dates do change relative to what was originally announced; it happened with my last book too, which was also with Frontline.

It's also listed on Amazon: http://www.amazon.co.uk/Destructive-Formidable-British-Infantry-Firepower/dp/1848327684/ref=sr_1_1?s=books&ie=UTF8&qid=1418218725&sr=1-1