PPS 3 Access Movement and Parking·Page 38·5.66
Surface Parking Under Raised Ground Floor - Design Standards
Surface parking beneath a raised ground floor must not create dead frontage or unimaginative elevations, as this removes street activity and creates an unpleasant environment.
Surface parking underneath a raised ground floor can create the same effect to an even greater extent, particularly where ground floor elevations are entirely made up of metal grids or finished in an unimaginative way. This can effectively remove life from the street and contribute to the creation of a threatening and unpleasant environment. Such an approach to the provision of car parking will be unacceptable.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 3 - Access Movement and Parking.pdf