The content of First Aid Courses keep changing, please don't tell me if some mnemonic has been updated without a good reason. However, if there is a "genuine" reason for the change (e.g. Awareness of Agaonal Breathing in CPR,) I would welcome an email.
Some of these Mnemonics are intended for medical experts and not relevant unless you are trained and some duplicate others.

Mnemonic	Meaning	Explanation
ABBBBB	Assess Breathing Bleeding Breaks Burns Body_temp
ACT	Access Communicate Treat
ASH ICE	Age Sex History Injuries Conciousness(level_of/any_changes) Everything_else	What to tell medics
AVPU	Alert Voice(responds_to) Pain(can_it_be_felt) Unresponsive	Levels of conciousness
CASMEET	Callsign Age Sex History Injuries/Illness Condition ETA
CHALETS	Casualties(number_and_condition) Hazards Access(how_to_get_to_scene) Location Emergency_Services(what_is_needed) Type(of_incident) Safety(any_dangers)
CHAT	Chief_complaint History Allergies Treatment
DOTS	Deformity Open_wound Tenderness Swelling	Head to toe survey
Drs ABC	Danger(check_for) Response(check_for) Airway Breathing Circulation Disability Examination Further_treatmet Go_to_hospital	Ambulance treatment
Dr ABCDEFG	Danger(check_for) Response(check_for) Shout(call_ambulance) Airway Breathing Circulation	What to do if you find an unconcious casualty
FISH SHAPED	Fainting Infantile_Convulsions Shock Head_injury Stroke Heart_attack Asphyxia(breathing_problem) Poisons Epilepsy Diabeties	Causes of Unconciousness
HEAD	Head Examination Action Documentation
LIP DUST	Loss(of_movement) Irregularity Pain Deformity Unnatural(position/movement) Swelling Tenderness	Warnings to suspect a broken bone
Look Listen Feel	Look(for_chest_movement) Listen(at_mouth) Feel(can_you_feal_breath)	Is casualty breathing See note on Agonal Breathing
PEARL	Pupils Equal_and Reactive_to Light
PEEP	Position Exposure Elevate(the_bleeding_limb) Pressure	Dealing with bleeding
PLASTIC	Pain Loss(of_movement) Angle(bones_displaced) Swelling Tenderness Irregularity Crepitis	Warnings to suspect a broken bone
PQRSTU	Provoke Quality(Ache/sharp/pulsing) Radiating Severity(does_this_change?) Timing Usual(Does_casualty_think_this_is_normal)	Recording casualties perception of pain
REED	Rest Expose Elevate Direct(pressure)	Severe Bleeding
RICE	Rest Ice Compression Elevation	Sprains and Strains
SAMPLE	Signs(and_Symptoms) Allergies Medication Previous(Medical_History) Last(When_casualty_last_ate/drank) Event(history)
SCALD	Size Cause Age Location Depth

Notes
Agonal Breathing - It is possible for an unconcious casualty to make noises similar to gasping without breathing. Not breathing will cause death, with CPR they have a chance! (There is an internet video clip in circulation showing successful CPR on an Agonal patient)
 
CPR - Adult who has drowned = 5 rescue breaths then repeat (30 chest compressions + 2 rescue breaths) until help arrives
CPR - Adult who did not drown = repeat (30 chest compressions + 2 rescue breaths) until help arrives
CPR - Child = 5 rescue breaths then repeat (30 chest compressions + 2 rescue breaths) until help arrives
 
CPR - Death due to Chemical Poisoning - Consider your own safety, if chemicals killed the casualty, they may also kill you!
 
These notes are not intended as First Aid advice - they are purely some mnemonics that could be both outdated and wrong - if you want to know more consider a course or first-aid sites provided by medical experts.