I want to know the answer to the following question:
Which Austrian school's failure to give Popper a directorship prompted him to return to the United Kingdom at the end of his life?
All the background I'm provided with is that "After the Ludwig Boltzmann Gesellschaft failed to establish him as the director of a newly founded branch researching the philosophy of science, he went back again to the United Kingdom in 1986, settling in Kenley, Surrey.". Is that enough to answer the question?