Gary Butler, an expert in the resolution of lift issues asks the question.

Building design standards have changed since the disaster that occurred at Grenfell Tower; it has become a mandatory legal requirement to install sprinkler systems in common areas in newly constructed or fully refurbished residential buildings i.e. stairwells and corridors. From November 2020 the systems must be installed in all buildings above 18 meters (4 storeys). Before this the requirement related to all buildings above 30 meters or 8 storeys or by choice rather than by law. The major problem with lifts is that they are located within the same area as the sprinkler system

A typical sprinkler head can deliver between 95L/min and 378L/min depending on the building design. A typical corridor may have several sprinkler heads fitted, which would create a torrent of water if they all operate together; this water by nature, will always find its way to the lowest floor, in some cases via the stairwell, in other cases via the lift shaft.

Lifts generally carry no water protection and this amount of water entering a lift well can cause severe damage to the lift, causing short circuits and component failure.

This, again for most lifts, will mean the lift is unsafe, as it is a requirement for all new lifts to return to the ground floor and shut down in the event of a fire, as per the requirements of EN81-73. So in these circumstances, when on the ground floor the lift cannot be used.