The author Tony Horne, ghost-writer of the officer's book Tango 190, called for Rathband's Law - legislation to ensure 999 personnel get the help they need if they are injured by a criminal act at work.
If you are a public figure who has stood by David sincerely in support, or as a cynical photo opp, your time is now and your duty is to make sure that there are no empty promises and hollow words - make the ethos of the Blue Lamp Foundation a political reality."
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The note was left for paramedics attending an emergency call in Stoke-on-Trent on Sunday morning.
Monday will see a dull, damp and murky start, with temperatures reaching highs of 13C (55F).
Alexander Krushelnitsky is widely reported to have tested positive for meldonium, a drug which increases blood flow.