Poloidally asymmetric distributions of nickel ions have been observed experimentally in Joint European Torus (JET) Optimised Shear tokamak plasmas following nickel laser injection experiments. Two types of asymmetries occur. In the first type of asymmetry, which has earlier been observed in H-mode plasmas, nickel ions accumulate on the out-board side of the poloidal cross-section. This can be explained well by fast toroidal plasma rotation driven by neutral beam injection. The second type of asymmetry was opposite in position: in a radio frequency heated Optimised shear plasma, nickel ions have been seen to accumulate on the in-board side of the poloidal cross-section.