Story highlights Messages of thanks, support sent to police from civilians, celebrities and leaders

Saturday night's attack in London killed seven people

(CNN) If bravery can be quantified, then the story of the first responders and police forces who descended in the chaotic moments after this weekend's London attacks can be told in sheer numbers.

The figures are impressive, but an even deeper impact made by the evening's heroes lies in the love shown by grateful citizens.

Whether it was through a simple online message, a postcard or a quick chat in the street, Londoners and supporters from around the world were quick to recognize the efforts of the city's professional protectors.

'At this awful time, thanks to all of you here'