The Metropolitan Police have announced that 400 extra officers will patrol the West End on Thursday, Friday and Saturday nights.
It is part of a New York-style policing crackdown, which aims to target crime and anti-social behaviour over the next six months.
More top news
The mayoral candidate said he believed the spike in knife crime and the restrictions imposed on police to stop and search are linked.
Dragos Moisica raped the victim on her 12th birthday in a hotel in Kenton. He has been jailed for 12 years.
A week after the sinkhole appeared, it is unclear when the area will be declared safe.