  There has been much recent interest in nuclear fission, due in part to a new
appreciation of its relevance to astrophysics, stability of superheavy
elements, and fundamental theory of neutrino interactions. At the same time,
there have been important developments on a conceptual and computational level
for the theory. The promising new theoretical avenues were the subject of a
workshop held at the University of York in October 2019; this report summarises
its findings and recommendations.
