A handy fold out guide and identification resource from the Field Studies Council. 

What the Field Studies Council says:
 
"The Butterflies guide features all 60 wild butterflies found in Britain and Ireland.
 
Our UK Butterfly chart consists of 8 fold-out pages featuring full-colour illustrations, making the identification of butterflies easy to follow. There’s a further butterfly identification guide on the reverse side, with a text description of the characteristics of each species.
 
It’s designed for speedy butterfly identification in the field, with beautiful colour life-size paintings of each butterfly by acclaimed artist Richard Lewington. We have shown both upper wings and under wings, so you can identify butterflies in flight and at rest. Similar-looking butterflies are close to each other for easy comparison.

Our popular wildlife field guides measure 24.5cmx17.5cm and are extremely lightweight so are the perfect identification aid for popping in your bag when heading outside. All wildlife identification guides are laminated, meaning they are showerproof for use outside. and can be wiped clean."