Uber loses licence to operate in London, will still operate while appealing

>At least 14,000 trips involved drivers who weren’t who the riders thought they were,

any idea what the source of this info is?

And not sure what the timeframe here is. Is it 14000 since Uber started operating in london?

The number comes from Cognizant who were hired to conduct an independent review [1]. They found that 43 drivers out of 45,000 drivers skirted Uber's identity checks committing identity fraud.

[1] https://www.ft.com/content/78827b06-0f6a-11ea-a225-db2f231cf...