  In this paper we further investigate the relationship, reported by Oates et
al., 2012, between the optical/UV afterglow luminosity (measured at restframe
200s) and average afterglow decay rate (measured from restframe 200s onwards)
of long duration Gamma-ray Bursts (GRBs). We extend the analysis by examining
the X-ray light curves, finding a consistent correlation. We therefore explore
how the parameters of these correlations relate to the prompt emission phase
and, using a Monte Carlo simulation, explore whether these correlations are
consistent with predictions of the standard afterglow model. We find
significant correlations between: $\rm log\;L_{O,200\rm{s}}$ and $\rm
log\;L_{X,200\rm{s}}$; $\alpha_{O,>200\rm{s}}$ and $\alpha_{X,>200\rm{s}}$,
consistent with simulations. The model also predicts relationships between $\rm
log\;E_{iso}$ and $\rm log\;L_{200\rm{s}}$, however, while we find such
relationships in the observed sample, the slope of the linear regression is
shallower than that simulated and inconsistent at $\gtrsim 3\sigma$.
Simulations also do not agree with correlations observed between $\rm
log\;L_{200\rm{s}}$ and $\alpha_{>200\rm{s}}$, or $\rm log\;E_{iso}$ and
$\alpha_{>200\rm{s}}$. Overall, these observed correlations are consistent with
a common underlying physical mechanism producing GRBs and their afterglows
regardless of their detailed temporal behaviour. However, a basic afterglow
model has difficulty explaining all the observed correlations. This leads us to
briefly discuss alternative more complex models.
