lf it counts, Bristol Temple Meads has parking underneath the old trainshed. l think there was a plan a few years ago to reinstate some platforms in there post signal box decommissioning but this may have been scrapped now?
The parking is still there at track level. There was an idea to use that area to terminate the proposed fast trains from London via Parkway (so on the correct side of the station to minimse conflicts) but I believe that was dropped even before the trains were.
More generally, ability to drive into stations has been much reduced in recent years. The ending of rail parcels traffic removed one reason to allow them, and safety and security considerations mean that a busy concourse isn't the best place to have road vehicles. Where it is still possible (including basement areas), substantial security barriers are often provided, likely to be proof against ramming by a truck.
I can recall as a young child (early 70s) that my uncle drove right into a main London terminus to pick us up when returning from holiday, though I don't recall if it was Victoria (from Gatwick) or Waterloo (from Weymouth) the following year.
