Negligence: duty of care and breach

In Donoghue v Stevenson (1932), who did Lord Atkin say is your neighbour in law?

What was the main significance of Donoghue v Stevenson (1932)?

Which three questions make up the test set out in Caparo v Dickman (1990)?

In Caparo v Dickman (1990), why did the auditors owe no duty to Caparo when it relied on the audited accounts to buy more shares?

What did the Supreme Court decide in Robinson v Chief Constable of West Yorkshire (2018) about the Caparo test?