  The isotropy in the ultra high energy cosmic ray (UHECR) flux observed by
Yakutsk and AGASA experiments, is a very strong constraint to production and
propagation models alike. Most of the scenarios proposed in the literature
should produce a sizable anisotropy as either extragalactic luminous or dark
matter is normally associated with the invoked particle sources. We explore the
possibility that the magnetic fields in fossil cocoons of former radio galaxies
-- so called {\it radio ghosts} -- are able to scatter UHECR in the
intergalactic medium giving rise to the observed isotropy. We show, through
numerical simulations, under which conditions this process can be operative and
the magnitude of the effect. We further demonstrate, that if radio ghosts mix
with the ambient medium, they might be able to produce the observed magnetic
fields in clusters of galaxies. In the case of mixing, the UHECR isotropization
would be even stronger than in our conservative estimates.
