  We utilise a form for the Hubble parameter to generate a number of solutions
to the Einstein field equations with variable cosmological constant and
variable gravitational constant in the presence of a bulk viscous fluid. The
Hubble law utilised yields a constant value for the deceleration parameter. A
new class of solutions is presented in the Robertson-Walker spacetimes. The
coefficient of bulk viscosity is assumed to be a power function of the mass
density. For a class of solutions, the deceleration parameter is negative which
is consistent with the supernovae Ia observations.
