PPS 3 Access Movement and Parking·Page 38·5.65
Basement and Semi-basement Car Parks - Design Requirements
Basement or semi-basement car parks must be designed to be safe and avoid creating dead frontage or negative street-level impacts.
The design of basement or semi-basement car parks requires careful attention to ensure that they are safe to use and do not have a negative impact at street level by the creation of dead frontage.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 3 - Access Movement and Parking.pdf