"Closing ambulance stations will not improve response times, that is absolutely clear, " he said.
BBC: New East Midlands Ambulance Service plan to go before board
He said it was important to differentiate between closing enquiry offices and closing police stations.
"A lot of fire and rescue authorities are actually making the savings not by cutting fire and rescue posts, not by closing fire stations, but by shared operations, better joint working, and interestingly, amended shift practices, " he said.
But his City Hall opponents claim he will damage the capital's emergency services, closing 12 fire stations and 65 police stations.
The UK government is closing eight coastguard stations as part of a modernisation plan, including Great Yarmouth, Liverpool, Thames, Swansea, and Portland.
Navin Shah, Labour's fire spokesman on the London Assembly, said the mayor's move was the first step in closing the 12 stations.
The Green Party said as well as closing 12 fire stations, the proposals included redundancy for 400 fire fighters and 100 civilian staff.
Department plans include shedding jobs, closing some police stations, reducing the prison population (finding custody alternatives) and reduce the scope of the island's fire and rescue services.
Yet spending cuts are now resulting in "thousands of fire-fighters losing their jobs, dozens of fire stations closing, and response times going through the roof", he said.
And the onset of standard time's early nightfall seemed inconsequential as voters arrived at polling stations until closing time.
Her comments followed a question from shadow home office minister Lord Hunt of Kings Heath, who asserted that the government did not keep figures on how many police stations were closing because the numbers were "too embarrassing".
As transport patterns changed over the past century, the underground network waxed and waned, with new stations opening and others closing to match demand.
Mr Raymond said that some of the other proposals include removing fire engines from Telford or Shrewsbury and closing up to four retained fire stations.
This is to fill the energy gap from closing a number of coal and nuclear power stations over the next two decades, and to meet the government's carbon dioxide emissions targets.
Polling stations at 12 locations across the area are closing at 22:00 GMT on Thursday.
Heyman says neither candidate has offered detailed plans for closing security gaps at the nation's airports, train stations and elsewhere.
Along with cutting full-time firefighter posts, other recommendations include closing Haworth fire station in Bradford and merging Shipley and Idle fire stations to a new site.
To meet European laws on dirty power stations, and to help meet its long-term carbon emissions targets, the government is closing some of the UK's biggest coal-fired plants in the next five years.
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