Duty of care can be established through: AN EXISTING PRECEDENT e.g doctor owes patient duty of care.
Donaghue V Stevenson - Neighbour Principle - landmark tort case which established that a duty of care is owed in establishments.
Caparo V Dickman Three Tier test - Reasonably foreseeable, proximity and Fair, Just and Reasonable.
Tier 1 - Was there reasonable foresight of harm to a person in the claimant's position. Kent V Griffiths - C was having Asthma Attack and despite repeated assurances it did not arrive. C suffered serious respiratory failure. Defendant liable as court held there was reasonable foresight of harm - predictable that it would have happened to a reasonable person.
Tier 2 - Was there sufficient proximity between the claimant and the defendant. Bourhill V Young - Claimant heard sound of an accident and later walked over after it had occurred. Shocked by blood; suffered miscarriage. There was no proximity as too much distance and time delay from accident. (could also be used for reasonably foreseeable).
Proximity because Claimant has a particular relationship with Defendant which is recognised by law. Might be that claimant is defendants professional customer.
Tier 3 - Is it Fair,just and reasonable for a duty to be owed - based on public policy. Hill v Chief Constable West Yorkshire: Claimant was mother of final victim of Yorkshire ripper - sued the police claiming her daughter would not have been murdered if police investigation had been better handled. It was not fair for a duty to be owed as would open floodgates for more cases, awards for damages would largely reduce money available for protecting the public at large.
Where police chase injury to claimant, they will owe a duty of care: Robinson V Chief constable West Yorkshire. Police officers, when trying to arrest a suspect, caused injury to innocent passer (claimant). Duty of care was established as negligent conduct towards C. Personal injury could not be denied for policy reasons.