Haha
Reckon Derek has spent an evening (after a few shandies) trawling Google images found one and thought "that will do", save image as "Leigh Leperds" and sent off to the shirt manufacturers.
Apparently the reason behind it? His love for leopards!!
He's the kind of person that will have a pub bar in his front room with leopard print and sheepskin rugs all over the house.
The man's a lunatic, I give him 12hrs on twitter before he's offering to fight someone again.