  The double copy formalism provides an intriguing connection between gauge
theories and gravity. It was first demonstrated in the perturbative context of
scattering amplitudes but recently the formalism has been applied to exact
classical solutions in gauge theories such as the monopole and instanton.
  In this paper we will investigate how duality symmetries in the gauge theory
double copy to gravity and relate these to solution generating transformations
and the action of $Sl(2,R)$ in general relativity.
