I have the 2010 edition and it's okay. His take on brewing is interesting to read but it's unlikely you'll learn anything new. The biggest thing with the recipes is that most use "standard crystal", which he gives as a range of 130-170 EBC, so 50-65. I imagine the breweries are a bit more exact and I have found English crystal can vary a lot by maltster
I have brewed the London Pride recipe a couple of times and it gets in the ballpark of the cask beer.
I've had more fun with the Real Ale Almanac, which is out of print, but can be found online at used book sellers. The authors surveyed British brewers and list ingredients. Apparently they made things up in some cases, though.