While waiting for rulings on what we can chargen with, I threw together this brief timeline of London.
1994: Edward Arthur Charles Gordon-Windsor future Lord Protector is born.
2009: Charles III crowned
2011: The Awakening, Stone Circles and ley lines EVERYWHERE
2012: Charles III Abdicates and vanishes. George VII ascends to throne.
2014: Act of Dissolution, Treaty of Galway creates United Free Republic of Ireland
2021: Goblinization. George VII dies undergoing Goblinization.
2025: George VIII Crowned . Office of the Lord Protector is created, Lord Marchment named Lord Protector.
2027: Magical Practitioner's Act passed by the Office of the Lord Protector.
2031: Start of the EuroWar I
2037: End of EuroWar
2038: Project 42-20 revealed to public. Lambeth Containment Zone (The Squeeze, Unreal City) is created
2039: Terrorist Actions cause the Green Party (druids) to seize most of the control of Parliament
2047: London Bridge Station bombed, the Underground is restructured
2051: Princess Caroline marries Jurgen Meiers
2057: Princess Caroline divorces Jurgen Meiers
2061: Year of the Comet.
2062: Lyonesse Emerges from English Channel. The Pendragon appears during the Winter Solstice
2064: Crash 2.0, Winternight et all
2066: Policlubs march on St. Paul's cathedral, riots burn the landmark to the ground.
2071: Pendragon stages march against Lord Protector's office. March ends at Buckingham with the support of now-Queen Caroline. Pendragon vanishes. Lord Protector's office abolished after Lord Protector steps down.
2075: Present Day
Things to note: Date unknown but Caroline ascended to the throne sometime between 2063 and 2071. 2063 and prior the monarch was George the VIII
Should give most people a fair baseline of what they were likely to have seen depending on how old they are.