How did Uriah Heep (band) get their name?

Formerly known as Spice, the name was changed to that of the well-known character from David Copperfield, Uriah Heep (according to biographer Kirk Blows, "Dickens' name being everywhere around Christmas '69 due to it being the hundredth anniversary of his death"). According to Dave Ling's 2001 autobiography of the band, Wizards and Demons, The Uriah Heep Story, though the "Uriah Heep" moniker was chosen in December 1969, the band continued to play gigs as "Spice" until Ken Hensley joined in February 1970. Uriah Heep then decided to widen the sound.