  We report an experimental implementation of a single-qubit generalised
measurement scenario(POVM) based on a quantum walk model. The qubit is encoded
in a single-photon polarisation. The photon performs a quantum walk on an array
of optical elements, where the polarisation-dependent translation is performed
via birefringent beam displacers and a change of the polarisation is
implemented with the help of wave-plates. We implement: (i) Trine-POVM, i.e.,
the POVM elements uniformly distributed on an equatorial plane of the Bloch
sphere; (ii) Symmetric-Informationally- Complete (SIC) POVM; and (iii)
Unambiguous Discrimination of two non-orthogonal qubit states.
