Hi Gibbz -
I have reported the issue as UE-14916 and will keep you informed as we investigate this issue. In the meantime, the most correct workflow would be to adjust the size of your skeletal modeling in Blender to use the cm scale so you will not need to scale up the model when you import the mesh into the engine. This is the preferred workflow when importing from most modeling programs.
Thank You
Eric Ketchum