Smith and Allen are ok. I would be much more concerned if this oil were made by Derek and Clive.Hi.
I guessing you are a fellow Brit.
Smith and Allen are just a blender of lubricants. They will purchase a base oil and then add the necessary additive package for a certain specification, like many lubricant retailers.
I would be happy to use their products.
There are many on here better able than me to make sense of those figures. I posted it in the hope that will happen.