London taxis (or cabs) are no longer just black, some are painted in brighter colours, and many have advertisements painted on their sides. If the yellow "For Hire" sign is lit, you can either hail a cab on the street or pick one up from a taxi rank.
Always use a licensed taxi with a fare meter – check the back of the taxi to ensure it carries an official licence plate.
Tipping: As a guideline it is customary to tip taxi drivers between 10-15% of the fare.
View approximate taxi fares and journey times on the London Taxi website