THOUSANDS flocked to the historic HQ of the RAF in the glorious sunshine over the weekend.
Organisers at Bentley Priory Open Day put the turnout over the four-day event at more than 5,500.
The building and grounds were the Air Force's HQ during the Battle of Britain, when the outnumbered RAF's victory arguably changed the course of the Second World War.
Familes were shown round the grounds and given tours by volunteers from the Bentley Priory Battle of Britain Trust and the Stanmore Aircadets.
Squadron leader Erica Ferguson, who organised the event, said: "The weather was lovely which helped but more important than the number of visitors was the support we got from the public.
"I didn't get a single complaint from anyone over the four days, it was the Blitz spirit maybe.
"We were inundated with requests to know what was happening next."
Volunteer Katy Martin described an emotional scene she witnessed.
She told the Harrow Observer: "I was selling guides at the entrance to the Priory when a Canadain veteran came in. Someone started clapping and others joined in, soon everyone was applauding. He seemed very moved.
"The whole event was fantastic, I am exhausted."
The Ministry of Defence has appointed an agent to try and find a firm that will develop the site whilst maintaining its historical character.
Planning permission has now been given for flats on the grounds whilst guaranteeing a museum will remain on the site.