There is a £2 additional fee for cabs called by phone
Some taxis accept credit cards, usually with a surplus of 10% to 15% in the price from the meter.
Tipping on taxi services is not mandatory, although it may be expected, at about 10%. Most people round up to the nearest pound, though.
Black cabs are legally obliged to take on any job for journeys up to six miles (20 miles for cabs at the Heathrow Airport taxi ranks).
It can be difficult to hail a cab in popular tourist or nightclub areas at certain times of the day.
Try to avoid unlicensed minicab drivers seeking passengers, especially in stations and airports; use a Black Taxi or a licensed private hire vehicle with the distinctive Transport for London licence disc.