National retailers Coles Myer and Woolworths may have received a referendum-delivered blow to their supermarket expansion plans in Western Australia last month, but the pair’s growth has not been entirely unchecked in recent years.

National retailers Coles Myer and Woolworths may have received a referendum-delivered blow to their supermarket expansion plans in Western Australia last month, but the pair’s growth has not been entirely unchecked in recent years.