Apparently the differences in bands by board of studies is stated to be linear with regards to raw--> aligned
That being said, I'm not sure whether this applies for bands E4 or 6 from marks between 45-50/50 and 90-100/100 respectively
So if this is true then it could be assumed that 45+((2.5/10.5)*5)/50
so 42 would probably align to be 46.2 --> 46