Demolition of existing building above ground with retention of existing basement and piles/foundations and erection of a mixed use office building comprising two basement levels, lower ground, upper ground and upper ground mezzanine plus 18 upper storeys for the provision of office space (Use Class E), gym/auditorium (Use Class E), flexible office, café/retail (Use Class E), reprovision of existing library (Use Class F1), flexible library/office (Use Class F1/E) and restaurant (Use Class E), discontinuance of the City Walkway (Little New Street To Wine Office Court), enhanced and enlarged public realm, hard and soft landscaping, highway works, and associated enabling works.