  We present a new solution in Einstein's theory of relativity, found through
the use of the symmetries of the Ernst equations and in particular the Harrison
and Ehlers transformations. The new metric represents a Reissner-Nordstr\"om
black hole immersed in a magnetic, rotating universe. We analyse the physical
properties, such as conical singularities and ergoregions, and then proceed to
immerse the accelerated version of the Reissner-Nordstr\"om black hole in the
same background. We finally analyse its properties and attempt to regularise
the spacetime.
