The UK's taxi app market has stepped up a gear with the launch of Indian firm Ola's services in London.
The ride-hailing company began operating in Cardiff in 2018 and has since spread to other UK locations.
It has its sights trained on US-based rival Uber, which is appealing against a decision to end its London licence following repeated safety failures.
But one expert sees the sector as a "winner-take-all" market that can only be profitable as a monopoly business.
Ola says it already has three million customers across the UK and hopes to be number one in London within a year.
