Percy Blakeney (pronounced 'Black-Knee') is a character in The Long Earth. He is a World War I soldier, who, in 1916, suddenly finds himself- not in No Man's Land, not in France, but in a strange forest. There is birdsong in the trees. And a lot of hairless, bear-like creatures surrounding him. When he sings Pack Up Your Troubles in Your Old Kit Bag the creatures respond in his own voice.
He was given the nickname Pimple
He was originally a country lad, and therefore knows how to cook carp.
Sir Percy Blakeney was the alter ego for the Scarlet Pimpernel in Baroness (Emmuska) Orczy's books.