Booth's Gin is a famous brand of London dry gin, founded by the Booth family around 1740 and, as of October 2013, still produced today. The distinctive bottle has a reference to the Red Lion distillery where the drink was produced.
The brand is currently owned by Diageo Spirits.
Kingsley Amis preferred Booth's for mixing a Pink Gin.
References
Booth's Gin Wikipedia(Text) CC BY-SA