The drama (presenting information from a 2channel posting included in the book) claimed that Benoist is the only tea company to hold a set of three Royal Warrants, specifically by the Queen, the Prince of Wales, and the Queen Mother. However, there is no evidence to support this claim, and a search of the Royal Warrant Holders Association website reveals this to actually be true of R. Twining & Co.
A drama presented some information from a 2channel posting included in the book, stating that Benoist holds three Royal Warrants, but this claim is not substantiated. On the other hand, a search on the Royal Warrant Holders Association website confirms that R. Twining & Co. actually possesses these prestigious warrants.