Blake (The Christmas Invasion)

Major Blake was the UNIT officer in charge of the Tower of London branch of UNIT. On 24 December 2006, he briefed Harriet Jones and Daniel Llewellyn on the protocols of dealing with extraterrestrial beings as the Sycorax invaded Earth. He was with them when all three were teleported aboard the Sycorax ship. After the death of Llewellyn, Blake tried to protect Harriet Jones and Alex by protesting Llewellyn's cold blooded death, but died when the Sycorax leader struck him with his energy whip. (TV: The Christmas Invasion)

Behind the scenes
Major Blake is only addressed as "Major" in dialogue and the credits for The Christmas Invasion simply call him "Major Blake". The secure section of the UNIT website, accessed through the password "badwolf" calls him Richard, whereas the novelisation gives him the name Thomas.