https://en.wikipedia.org/wiki/London%2C_Ontario

London is at the confluence of the Thames River...its economic activity is centered on...financial services...London annexed nearly the entire township of Westminster...

As per the 2021 census, the most common ethnic or cultural origins in London are English (21.9%), Scottish (17.4%), Irish (16.8%)...

London's city centre mall was first opened in 1960 as Wellington Square

Although London has many ties to Middlesex County...

London stretches...east to Dorchester

London proved a centre of strong Tory support...

https://www.planetware.com/canada/top-rated-things-to-do-in-london-ontario-cdn-1-267.htm

Fancy a stroll along the banks of the Thames River, possibly crossing over it using Blackfriars Bridge? Or perhaps doing a little shopping in Covent Garden Market before visiting St. Paul's Cathedral?

I'm impressed at the level of dedication there. It doesn't appear to have its own Big Ben, though.

EDIT:

https://en.wikipedia.org/wiki/List_of_twin_towns_and_sister_cities_in_Canada

London[80]

• China Nanjing, China

Definitely missed an opportunity there, Canada. Could have been twins with London, UK.