  We consider the Navier-Stokes equations in $\mathbb R^d$ ($d=2,3$) with a
stochastic forcing term which is white noise in time and coloured in space; the
spatial covariance of the noise is not too regular, so It\^o calculus cannot be
applied in the space of finite energy vector fields. We prove existence of weak
solutions for $d=2,3$ and pathwise uniqueness for $d=2$.
