  We consider Schroedinger operators with a random potential of alloy type on
infinite metric graphs which obey certain uniformity conditions. For single
site potentials of fixed sign we prove that the random Schroedinger operator
restricted to a finite volume subgraph obeys a Wegner estimate which is linear
in the volume and reproduces the modulus of continuity of the single site
distribution. This improves and unifies earlier results for alloy type models
on metric graphs. We discuss applications of Wegner estimates to bounds of the
modulus of continuity of the integrated density of states of ergodic
Schroedinger operators, as well as to the proof of Anderson localisation via
the multiscale analysis
