  We present a comprehensive analysis of the form and interaction of dipolar
bright solitons across the full parameter space afforded by dipolar
Bose-Einstein condensates, revealing the rich behaviour introduced by the
non-local nonlinearity. Working within an effective one-dimensional
description, we map out the existence of the soliton solutions and show three
collisional regimes: free collisions, bound state formation and soliton fusion.
Finally, we examine the solitons in their full three-dimensional form through a
variational approach; along with regimes of instability to collapse and runaway
expansion, we identify regimes of stability which are accessible to current
experiments.
