  The phase-ordering kinetics of the ferromagnetic two-dimensional Ising model
with uniform disorder is investigated by intensive Monte Carlo simulations.
Taking into account finite-time corrections to scaling, simple ageing behaviour
is observed in the two-time responses and correlators. The dynamical exponent z
and the form of the scaling functions only depend on the ratio eps/T, where eps
describes the width of the distribution of the disorder. The agreement of the
predictions of local scale-invariance generalised to z<> 2 for the two-time
scaling functions of response and correlations with the numerical data provides
a direct test of generalised Galilei-invariance.
