Platycerus caraboides

These are fairly easy to find, if you know where to look. I normally found them in spring, around May, at the forest borders. Look for small pieces of white rotten wood, such as branches. Females and males are often sitting underneath. A tell-tale sign is the gnaw marks that the females produce when egg laying. If you see these marks, the female is normally not too far away.
Hope that helps
Cheers
Ben