London mayor Sadiq Khan is pressing Philip Hammond to allocate more funding to the Metropolitan Police in his Autumn Budget.
The mayor has asked the London Assembly's police and crime committee to back his call for a real-terms rise in funding for the capital's police.
Prime Minister Theresa May announced this month that she would lift the one per cent pay cap for police officers, and said they will receive a one per cent pay rise and a one per cent bonus.
However, the bonus must be funded from police budgets, landing London policing with a £13.7m bill. The mayor has argued that this is one of many pressures on the Met's budget.
Gareth Bacon, London Assembly member for the Conservative party, said he would welcome more funding for the police.
"Though it must be noted that Sadiq Khan unnecessarily cut £38m from the Met's recruitment budget in April, making it impossible for him to hit his strategic target for police numbers," Bacon said.
Khan said the recent terror attack at Parsons Green demonstrated the "unprecedented demands" on the capital's police service.
"I've made neighbourhood policing one of my highest priorities, but despite this progress, the simple fact is that the Met's budget is on a cliff edge and forces across the country are having to make impossible choices to protect the frontline," he said.