LoT 2- General Defences

Which one of the following famous cases is related to an exception to the application of the doctrine volenti non fit injuria based on rescue cases ?

In which of the following cases the House of Lords held that 'volenti non fit injuria' had no application to harm sustained by a workman from the negligence of his employers in not warning him of the moment of a recurring danger, although the man knew and understood that he personally ran risk of injury if and when the danger did occur.

Which of the following cases is an authority on "rescue cases"- an exception no maxim volenti non fit injuria?