I know Tiffins use the 21 types in M/C therefore with out a doubt, the graded test papers 100q in 50 mins are largely irrelevant [ too many types and in standard form]
The Tiffins VR is the same as the Bucks test. The only difference is that they only use 1 test which will cover 12 types from the bank of 21. [the 12 will change each year] Take a look at the following link..
I am unsure of the disciplines for Wallington Girls/Nonsuch, do you have any idea? Alternatively take a look at the Surrey section of the forum.