Here, written by my one-time co-author Noel Whelan, including this anecdote:
I, along with the Northern Ireland elections expert Nicholas Whyte rushed out a Tallyman’s Guide to the 2003 Northern Ireland Assembly Elections. Such was the rush that the book contained tables with columns which had not been completed. At the launch, a sharp-eyed photographer captured Garret, with his own calculations, handwriting in the missing figures to his own copy.
I can absolutely confirm this and still have the photograph of Garret completing page 44: 
I agree with you about all of this. Especially Mickey, Love and Monsters and Fear Her. In both the case of L&M and The Idiot’s Lantern I have a horrible feeling that I am not watching the same thing as everyone else. The main problem I had with this particular run was that in both The Impossible Planet two-parter and The Idiot’s Lantern the Doctor made some really wonky choices like not even trying to rescue the Ood and telling the son of the house to forgive his father, who, in my reading of the episode, was beating his wife (but as I said, it’s one of those episodes where I think I was watching a different episode).