  Radio imaging of ULIR galaxies is ideal to explore the connection between the
starburst and the AGN phenomenon since it is unaffected by dust obscuration,
and provides the required high angular resolution to distinguish between an AGN
and starburst emission. We have made combined 18cm radio continuum, EVN and
MERLIN observations of 13 ULIRGs that have the parsec and deci-parsec scale
resolution necessary to distinguish between an AGN and supernovae remnants at
the centres of these galaxies, and assess the contribution of each to the total
energy distribution. Images of four galaxies are presented here.
