W&C Scott was never in the thick of things with the London shooting crowd, so they made their money exporting guns.
Our own Rocketman has W&C Scott in the third tier - for every nice gun made, there were hundreds of rough, keeper and for export guns. This might not have gone over well with the uppish.
Why would the lord, have a gun like his keeper hmmmmmmm?
Thus you have the London trade!