It depends on where you want to go. The best way to find taxi fare estimates is to go to a site like, TaxiFarefinder.com. There is a site for London, you can use.
http://www.taxifarefinder.com/main.php?city=London
In London, it is customary to tip taxi drivers 10-15 of the fare.
Not much
A London Taxi Cab will cost between £50,000-£80,000 to purchase.
London is a large city, so it will depend on which part of London you are travelling from.
About £15
Between £150 and £200.
About £80
Around £25
There is a taxi rank at every main station in London, including Victoria.
Distance between piccadilly St. Pancras
Approximately 15-25 mins and £15
The Knowledge.