Since the fire, and no doubt as a result of it, the government has issued new guidelines outlining some design aspects to be considered in multi-storey car park design for EVs.
https://assets.publishing.service.go...c-vehicles.pdf
Among these are:• Suppression systems
• Increased structural fire resistances
• Distance between parked cars
• Firefighting water supplies
• Water run-off control and containment
• Locations and features of EV chargepoints
• Enhanced smoke management systems
• Thermal imaging cameras and other early detection methods, to enable early intervention
This looks likely to significantly increase the cost compared to the original car park, with potentially reduced revenue from wider spacing between vehicles.