  We review the Universal Extra-Dimensional Model compactified on a S1/Z2
orbifold, and the renormalisation group evolution of quark and lepton masses,
mixing angles and phases both in the UED extension of the Standard Model and of
the Minimal Supersymmetric Standard Model. We consider two typical scenarios:
all matter fields propagating in the bulk, and matter fields constrained to the
brane. The resulting renormalisation group evolution equations in these
scenarios are compared with the existing results in the literature, together
with their implications.
