I'm using this product with a Yamaha YCR2330III "Long Model" Cornet which is not the standard in use in Brass bands in the UK.
Warburton make a range of cornet tops and backbones for "short model" cornets as commonly used in the UK, with the "BC" suffix.
I believe that there are compatibility issues if the correct shanks aren't used for these different designs. As I'm a long way from a brass dealer I've not been able to test this..
I've owned Warburton pieces in the past and have found their modular system very useful, including the 8 shank, but I feel that the 7 is a safe all-round bet.