Tony Purnell (the shooting victim) blinks while lying on the dining table, supposedly dead.
"The Gazette"'s report includes two typos ("But inspite of their gallants efforts") in its coverage of the fire at Apsley House.
When the office equipment goes haywire and starts printing details of George McDee's death, it identifies him as a notable physicist, in contradiction to the story, which shows his field to be biological / genetic.