I mentally planned at least 3 wildlife-related adventures just in my local area while reading this book! As an introduction to, and invitation to fall in love with Britain's native wildlife, it's a great book! 
I could have done without the author's tattoo competition sub-plot running through the chapters. I get that it was the inspiration for this book, and that it's used as a way to tie each animal/expert he met together into the book. However, I think I would have enjoyed meeting each expert and learning about each animal through their enthusiasm just as much, maybe even more without the addition of the author's opinion on each of the animals. 
Also, the author's own expertise is in hedgehogs and I know he's written a whole book on those, but as someone reading this book without having read his previous one on hedgehogs, I'd have loved a chapter about them as well!