Last year's Olympic Games has also bolstered London's credentials when it comes to hosting safe, international sporting events, Britain's culture secretary, Maria Miller, said.
"You will know from London 2012 last year, this country has a great deal of experience of ensuring our sporting events go well and that security is at the heart of the planning process. The London Marathon is no different," she told the Commons this week.
Deputy Prime Minister Nick Clegg promised security would be "double, triple, quadruple checked."
Show of support
With tight security measures in place, the public has been urged to get behind the great British sporting event -- as much for the competitors on the day as a sign of solidarity with Boston.
"Obviously, in light of what happened in Boston, we've had to have a look at security and we have a detailed and well-thought-out plan with the Metropolitan Police which we have year-in, year-out," London Marathon chief executive, Nigel Bitel, said.
"It's a great occasion, the London Marathon, and I know that people will want to come out and send a message of support to runners on the day."
Similarly, reigning marathon champion, Wilson Kipsang, told competitors to try and put security issues out of their minds as they wind their way along the 42 kilometer route from Blackheath to Buckingham Palace, home of the Queen.
"When you are running and you are thinking something like that can happen, you can't concentrate," the Kenyan told Athletics Weekly.
"We should have no fear during the race because security matters will be put in place and we will run feeling free."