Why not present both, with relevant comments?
Also, in my experience (marine SI), the weight of sample for testing required by BS can be beyond the recovery in shelby and drop-core samples. Something for you to check.
The book is Cone Pen. Testing in Geotech. Practice by Lunne et al, Blackie, 1997. May be OOP. A library may have Penetration testing in the UK, pub. Thomas Telford, London, 1989.
I seem to remember that ASTM used to include a 'Strength of Soils' table in the form:-
Very soft - 0 - 12.5kPa
etc.
It's not obvious in the recent issue.
Does anyone know if it's been dropped, and if so, why
thanks