British Inventions/Patents/Firsts:
TV
Telephone
Jet Engine
The World Wide Web
Electric Batteries
Electric Lightbulb
'Cat's Eye' road reflector
Powered Flight
Carbonated Water
Lawnmower
Steel Ribbed Umbrella
The Geologic Timescale
Reflecting Telescopes
Railways
Spinning Jenny - textiles (Kicking off Industrial Revolution)
The Kelvin Temperature scale (defined in relation to absolute zero)
Rubber and Latex
Graphite (Pencils)
Refrigeration
Electrical Generator
Electric Motor
Screwdriver (used in Knight's armour)
Sextant
Newtonian Telescope
Toilet Paper!
The Paperclip
Steam Engines
Iron Steam Ships (the largest Steam ship ever built, was constructed by perhaps the greatest engineer ever - Brunel)
Bagless Vacuum cleaner
Clockwork Radio
Parliamentary Democracy
Modern Military Structure
In addition to these more historic inventions, a recent Japanese survey revealed that in the last 50 years, 40% of inventions that found global implementation originated from the UK. At international invention expositions, the UK regularly wins top awards for innovation.
As for culture and history, as enlightened and knowledgeable as Laz and co are, there's more to it than 'Knights and stuff'.