  In this paper we consider an $S^{1}/\mathbb{Z}_2$ compactified flat extra
dimensional scenario where all the standard model states can access the bulk
and have generalised brane localised kinetic terms. The flavour structure of
brane kinetic terms for the standard model fermions are dictated by stringent
flavour bounds on the first two generations implying an $U(2)_{Q_L} \otimes
U(2)_{u_R} \otimes U(2)_{d_R}$ flavour symmetry. We consider the constraints on
such a scenario arising from dark matter relic density and direct detection
measurements, precision electroweak data, Higgs physics and LHC dilepton
searches. We discuss the possibility of such a scenario providing an
explanation of the recently measured anomaly in $R_{K^{(\ast)}}$ within the
allowed region of the parameter space.
