And what could be more English and versatile than the good old .303. You already have the .470 so don't need another DG cartridge for that gun. Plenty of loads around for the .303 from 130gr to 215gr with this venerable cartridge having taken every species of game in the Commonwealth & Africa, and probably most other parts of the World too. Shot a beautiful Holland and Holland hammer double while in Germany in the .303 British cartridge so there is no shame in having this cartridge for your double.