Maybe he's thinking about the story about how Queen Victoria used to find the claret at state dinners too weak for her, so would take a flask of Royal Lochnagar

Maybe he's thinking about the story about how Queen Victoria used to find the claret at state dinners too weak for her, so would take a flask of Royal Lochnagar whisky to supercharge her wine.[1] [1] https://scotchwhisky.com/whiskypedia/1888/royal-lochnagar/ https://scotchwhisky.com/whiskypedia/1888/royal-lochnagar/