For everything fire or smoke related the procedure was the same (going from memory here):
- bring aircraft to a stop
- set parking brake
- mayday call to atc
- pa call to alert flight attendant
- both fuel levers cut-off
- Apu off
- both fire handles pull
- push Apu fire bottle
- push number one bottle for both engines
- asses situation to see if evacuation is required
+ If evacuation required, pa call for evacuation , atc call we are evacuating, batteries off
+ If not pa call remain seated, atc call we need tow truck.
As someone with past involvement in procedure design and risk management, though not in aviation, I am surprised at the order of the early items in this list. I would expect fuel cut off to appear early, certainly before setting the parking brake. In the G-VIIO case the residual momentum and the dying thrust from the operating engine could probably have moved the aircraft clear of the pool of burning fuel.