Well, the RWS basement carpark has a height limit of 4.5 metres,
which means any vehicle exceeding the height of 4.5 metres is not
allowed to enter.
Double-Decker buses have a height of around 4.2 to 4.4
metres.
Considering the Double-Decker bus is within the height limit of
the RWS basement carpark, yes, Double-Decker buses should be
allowed to enter the RWS basement carpark.
Pity CGA basement only 4m max. It would be great to see airport
routes get majority DD fleets.