I just found this on a website, thought I'd stick it here for reference:
The Brompton timeline
2010
Brompton receives the Queens award for international trade and Queens award for innovation
2009
Andrew Ritchie receives the Prince Phillip designers prize
Brompton Wide Range Hub (BWR) introduced - with a 302% range
Satin finish introduced across the whole range
2007
Rear frame clip introduced
2005
S-type (sports / straight) and P Type handlebars introduced
Superlight upgrade launched - including alloy headset, titanium forks, rear frame, pedal bolt and mudguard stays.
2004
Long wheelbase and improved hinge joints introduced
2002
Brompton 2 sprocket derailleur system introduced
2000
Mark 3 models introduced - better componentry all round
1995
Brompton receives Queens award for export
1987
Brompton goes into full time production
1981
First 30 Brompton bikes produced to order
1976
Brompton Bicycle is registered as a limited company
1975
Andrew Ritchie begins designing a folding bike in his flat, overlooking the Brompton Oratory