Was Peter given an unlawful direction to turn around as he was not yet arrested?
What rights do police have to make you jump and down, turn around, do the hokey pokey before placing you under arrest?
I might be naive here but Peter had voluntarily invited police in (mistake 2), voluntarily stepped outside off his property (mistake 3), then questioned why he was being asked to place his hands behind his back before he was arrested. Mistake 4 - making a nuisance after being arrested. PS Mistake 1 - giving son the phone.
One thing I have observed is NEVER ever resist arrest. Stay calm and quiet, rationally ask for the police for their names and station. Do not mention false arrest, do remember what happened and what was said when. Leave custody when told you are free to go, then go after them for false arrest. Police need to be reminded that not everyone is a criminal and that we (subjects of her Majesty) do have rights and they can get into trouble for abusing our rights.
I'm not sure if you need to raise your own claim for false arrest before the charges against you are heard, or do it concurrently, or do it later. Get good legal advice!