London

London is the capital city of the United Kingdom, located in the south of England and home to around eight million people (and also a big clock). Unlike some other major cities on Earth, London managed to avoid too much major Transformer activity in the 1980s.
And then came G2...
Marvel Comics
Generation 1
London contains the HQ for Action Force's European branch.
Megatron (or a clone thereof) was teleported underneath London, and roamed about ancient Roman sewers until he was encountered by Susan Hoffman & her team. Both Action Force and the Autobots turned up to investigate, and the two teams had to work together to stop Megatron as he tore through the London Docklands. Eventually Centurion gave his life to stop the Decepticon, but not before widespread destruction to the area had been caused. Ancient Relics!
Richard Branson would later salvage Megatron and Centurion's bodies from the River Thames as a publicity stunt - making it easier for the Seacons to capture them. Salvage!
Generation 2 (Fleetway)
Bludgeon and his Decepticon army attacked London en masse to attract Optimus Prime - both two Autobot units and an upgraded Megatron were drawn into the fray. The devastation caused to London was immense; the death toll and long-term effects are unknown. At one point, the Skyscorchers were seen bombing Big Ben and the Houses of Parliament. War Without End War Zone
Generation 2 (Marvel)
London got blown to frag by the Decepticons as part of their global onslaught. The Gathering Darkness
Generation 1 Japanese cartoon continuity
The Headmasters cartoon
Sixshot arrived in London in wolf form, threatening to destroy the country unless it gave him all its energy. Britain was one of several countries he was blackmailing until the Trainbots stopped him. Unfortunately, they stopped him after he'd smashed up London. Terror! The Six Shadows
Super-God Masterforce cartoon
Decepticon Godmaster jets Hydra and Buster had fun zooming over London. Also, there is a single "London Airport" instead of London Gatwick, London Stansted and London Heathrow. God, the tourist trade must have been crapped up by Sixshot... Super Warriors - The Godmaster Brothers
Trivia
- In The Headmasters cartoon, London was shown as a fog-swept land where people rode horses. Sod off.
- London's Natural History Museum contains several of the original Dinobot toys, as part of the popular culture section of its dinosaurs exhibition.

