Most minicab firms in London are quite small. The cab
firm at a suburban station may have only about forty
drivers. I've been told that Clarks at South Woodford
Station has about half that number and that Masons at
Woodford Station has about twice that number. There
is a handful of conventional cab firms - i.e. catering to
the general public on a cash basis - which are substantially
larger: e.g. Greyhound, The Keen Group, GLH.

There are also cab firms which deal exclusively with account
customers, 99 per cent of which are organisations. These cab
firms have their own fleet which their drivers have to use.
Addison Lee has an enormous account portfolio but also has
numerous cash customers. At one time they had about 1000
drivers, all using Addison Lee vehicles.

If there are 80,000 minicab drivers in London, even Addison
Lee's share is a small percentage.