If Uber can't make a profit before overheads are included,
they must be grossly incompetent. Remember how the London
minicab trade works. The driver is deemed to be self-employed,
and pays for the car, insurance and petrol himself. The customer
pays Uber by credit card and Uber pays a small percentage to the
driver.

As Uber seems to have taken a huge share of the market away
from both Hackney cabs and minicabs, the number of jobs per
day must be in the thousands. Multiply that number of jobs by
an average net revenue of, say, five pounds and you arrive at a
gross income which must be more than the cost of a minimal
office set-up.