Don't forget the European standards, which have caused a bit of an uproar whent they started to replce the old BS 5930 system. The new BS EN is quite simialr to the old system, although now they differntiate between a soil description and a soil classification.
There used to be a BSCS (british soils classificaton system) which was very similar to the USCS, this was then included in the first BS 5930, and now under the latest amendment to BS 5930, we are to describe and classify soils and rocks in accordance with BS EN 14688-1 (Soil identification), BS EN 14688-2 (Soil classification) and BS EN 14689-1 (Rock).