Dave Frampton spotted the fire shortly after it started from his office window in North Finchley.
Fifteen minutes after the blaze started Nelson Monteiro caught these images in Hendon in NW London
Alan Marshall watched from the British Library Offices in Colindale as flames engulfed the building site.
The Hendon Police Training College, a police station, homes and a student falls of resident were evacuated. Photo: Ben Hallinan
Angus Gulliver took this picture of the fire from the top floor of the John Kelly Girls Technology College in Neasden in North West London.
This astonishing picture of the massive fire was taken by Dean Crook who was at the Hendon Police Training Centre.
The fire took hold at two buildings under construction and also affected a nearby halls of residence building for Middlesex University. Photo: Wei Yecheng.
Wei, who's a student staying in the university halls of residence near by took this picture as the fire broke out. Photo: Wei Yecheng
Ajamu Mutumwa, who was practising his photographic skills, spotted the fire from the roof of his home in North London.
Although more than 2,500 people moved to safety, no-one was injured in the blaze.