The number of police officers on duty for the London Marathon has been boosted by 40% to provide reassurance in the wake of the atrocities in Boston according to Scotland Yard.
Chief Superintendent Julia Pendry revealed that there will be several hundred more officers out on the streets on Sunday, an increase of two-fifths on last year.
The senior officer, who has led the Marathon security operation for five years, said: "the most important thing is that there is no link between the Boston marathon and the London Marathon.
"However people need to feel reassured when they come out on Sunday.
"It is a good 40% increase on last year on numbers of officers on the ground. We've got more search dogs out, we have got more on high visibility patrols."