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 move comes amid a motion of no confidence that was tabled against Labour leader Jeremy Corbyn.
The first anniversary of the Sousse terrorist attack - which left 30 Britons dead - will be marked by families of the victims on Sunday.
Since Friday's EU result, the Liberal Democrats have recorded thousands of voters signing up to become members.